(53*10^1+1)/9 = 59
(53*10^2+1)/9 = 19 * 31
(53*10^3+1)/9 = 3 * 13 * 151
(53*10^4+1)/9 = 58889
(53*10^5+1)/9 = 7 * 84127
(53*10^6+1)/9 = 3^3 * 218107
(53*10^7+1)/9 = 281 * 209569
(53*10^8+1)/9 = 588888889
(53*10^9+1)/9 = 3 * 13 * 191 * 197 * 4013
(53*10^10+1)/9 = 29 * 2030651341<10>
(53*10^11+1)/9 = 7 * 743 * 113226089
(53*10^12+1)/9 = 3 * 23 * 135197 * 631273
(53*10^13+1)/9 = 58888888888889<14>
(53*10^14+1)/9 = 17 * 83 * 417355697299<12>
(53*10^15+1)/9 = 3^2 * 13 * 67 * 751229606951<12>
(53*10^16+1)/9 = 58888888888888889<17>
(53*10^17+1)/9 = 7^2 * 31 * 89 * 193 * 22569829103<11>
(53*10^18+1)/9 = 3 * 329007751 * 5966312213<10>
(53*10^19+1)/9 = 35153 * 1675216592862313<16>
(53*10^20+1)/9 = 19 * 953 * 25849 * 167677 * 7503599
(53*10^21+1)/9 = 3 * 13 * 47 * 253427327 * 12677028079<11>
(53*10^22+1)/9 = 12517 * 4704712701836613317<19>
(53*10^23+1)/9 = 7 * 71 * 2124609547<10> * 557696402171<12>
(53*10^24+1)/9 = 3^2 * 654320987654320987654321<24>
(53*10^25+1)/9 = 349 * 168736071314867876472461<24>
(53*10^26+1)/9 = 5113 * 111360113993<12> * 1034255646521<13>
(53*10^27+1)/9 = 3 * 13^2 * 13327 * 90011 * 118411 * 81772140781<11>
(53*10^28+1)/9 = 2683 * 207457 * 105799738467398271419<21>
(53*10^29+1)/9 = 7 * 223 * 16561 * 16840969 * 1352623173182761<16>
(53*10^30+1)/9 = 3 * 17 * 12841 * 4536807547<10> * 1982047149354257<16>
(53*10^31+1)/9 = 120078113 * 61180675733<11> * 8015954369141<13>
(53*10^32+1)/9 = 31 * 18996415770609318996415770609319<32>
(53*10^33+1)/9 = 3^5 * 13 * 3287077 * 567118554870944149877123<24>
(53*10^34+1)/9 = 23 * 97 * 409 * 1601 * 40310589560442874257537191<26>
(53*10^35+1)/9 = 7 * 281 * 293 * 11354969 * 16386399377<11> * 5491511425363<13>
(53*10^36+1)/9 = 3 * 4957 * 395998176914053452282219681856559<33>
(53*10^37+1)/9 = 326405309 * 180416455447080025554636088621<30>
(53*10^38+1)/9 = 19 * 29 * 1068763863682193990723936277475297439<37>
(53*10^39+1)/9 = 3 * 13 * 61 * 7329229 * 595871357 * 12029432117<11> * 47117581591<11>
(53*10^40+1)/9 = 149 * 3079 * 185267 * 692850179375183056547936753777<30>
(53*10^41+1)/9 = 7 * 424001327250702907<18> * 198412077321733576592461<24>
(53*10^42+1)/9 = 3^2 * 229 * 51748407725491<14> * 55215165353052770459937839<26>
(53*10^43+1)/9 = 4013 * 14674529999723122075476922224991001467453<41>
(53*10^44+1)/9 = 588888888888888888888888888888888888888888889<45>
(53*10^45+1)/9 = 3 * 13 * 4667681 * 32349500961430525597399897507381287871<38>
(53*10^46+1)/9 = 17 * 3257 * 9281 * 1195673 * 2367931 * 330532363747<12> * 122454980248841<15>
(53*10^47+1)/9 = 7 * 31 * 317 * 2663 * 2216444129<10> * 1450395385487912148927777280163<31>
(53*10^48+1)/9 = 3 * 67 * 501271 * 2507689 * 13773458719<11> * 1692185759629789241610049<25>
(53*10^49+1)/9 = 10752283 * 3298799699441195489<19> * 1660262380176485445205147<25>
(53*10^50+1)/9 = 739 * 3329 * 239372980092884845924419833288913837876474419<45>
(53*10^51+1)/9 = 3^2 * 13 * 1459 * 1165527063251<13> * 3765014076529339<16> * 7861460561971407767<19>
(53*10^52+1)/9 = 167 * 14011 * 78134629 * 322109995359186827336502074359471996393<39>
(53*10^53+1)/9 = 7 * 515067336524795608742933<24> * 163332011489208868386559634819<30>
(53*10^54+1)/9 = 3 * 5387 * 8707635732559824321347<22> * 41847052807226106255642564467<29>
(53*10^55+1)/9 = 83 * 2659762210397118455939<22> * 266754931187012601304719940252097<33>
(53*10^56+1)/9 = 19 * 23 * 479 * 10039 * 2541639593<10> * 2591150823447679301<19> * 42551933205159487009<20>
(53*10^57+1)/9 = 3 * 13 * 2221 * 1101236552042737127660087<25> * 61736154855446249525095147613<29>
(53*10^58+1)/9 = 71 * 499 * 3965856561418753<16> * 913040169703852921<18> * 459036879291487520557<21>
(53*10^59+1)/9 = 7^2 * 59^2 * 347769748425739267<18> * 9927535658504333494476174160217048443<37>
(53*10^60+1)/9 = 3^3 * 409156351 * 533065160425124777181914815781771882809595353321157<51>
(53*10^61+1)/9 = 89 * 1866239 * 1103332147509852948581<22> * 321343722490917900971861572396339<33>
(53*10^62+1)/9 = 17 * 31 * 3847 * 172049 * 257305087109999<15> * 6561453166308501629891899557641911631<37>
(53*10^63+1)/9 = 3 * 13 * 281 * 829 * 148512813557<12> * 21926131499689<14> * 199059066204226788437870936206463<33>
(53*10^64+1)/9 = 359 * 49019191643784740097637<23> * 3346360816993614953790702346101339322483<40>
(53*10^65+1)/9 = 7 * 109 * 257 * 5748979083815524879870233019<28> * 522378110656275874065734192259041<33>
(53*10^66+1)/9 = 3 * 29 * 728264322721541<15> * 92944794796829466582075448827225219628992044839267<50>
(53*10^67+1)/9 = 47 * 12799 * 49282981339841092466869<23> * 1986380718175649059629509064098448911077<40>
(53*10^68+1)/9 = 4271 * 29759 * 3730172089977087017722556953<28> * 1242100072305533309985810443475217<34>
(53*10^69+1)/9 = 3^2 * 13 * 16547659 * 55466237720565729836683461223<29> * 54838078261045641511833984944681<32>
(53*10^70+1)/9 = 1129 * 2741 * 88195945999353907520556011<26> * 215765378670882693727673163957842094791<39>
(53*10^71+1)/9 = 7 * 10949 * 212633 * 26514500951240233781<20> * 1362845863711392305683905690435328510601951<43>
(53*10^72+1)/9 = 3 * 719 * 2171293 * 92347603165931<14> * 29425049589630370660657<23> * 462723920953204436611363667<27>
(53*10^73+1)/9 = 9697 * 493408889 * 71486859077<11> * 172172101114549247911098526761304968708170293928429<51>
(53*10^74+1)/9 = 19 * 2237 * 13147 * 21269 * 49549587224890628757013562795184520972109482524621376411816441<62>
(53*10^75+1)/9 = 3 * 13 * 283 * 142117205582990823131<21> * 3754357786990020696302411950707766140279854825165687<52>
(53*10^76+1)/9 = 2725732791139691371<19> * 21623846397854740432531045757<29> * 999118805914652301317447479687<30>
(53*10^77+1)/9 = 7 * 31 * 233 * 4013 * 2902341725781357583013967727100136759054013957855304987577821344336573<70>
(53*10^78+1)/9 = 3^2 * 17 * 23 * 151 * 1128667 * 419055457115109314790079851167<30> * 23431485253274463520022226409514083229<38>
(53*10^79+1)/9 = 89209 * 10682802835522217<17> * 562354460792178941012377<24> * 109882702364219365064229799447570369<36>
(53*10^80+1)/9 = 383 * 23433124166539<14> * 111566858321982467377<21> * 588124387864359253689921572029875156845777861<45>
(53*10^81+1)/9 = 3 * 13 * 67 * 2557 * 31209873851407<14> * 28240423755099153711251387017524961447270896517250076371121047<62>
(53*10^82+1)/9 = 263 * 2925984664841200192944677627<28> * 76525392543354864447510303840891461792474968064843789<53>
(53*10^83+1)/9 = 7 * 422309 * 550513 * 380607811 * 950735493016461960237611043590906229478901146570429830821240321<63>
(53*10^84+1)/9 = 3 * 9873967 * 1573989528646067483<19> * 126304433483466176985753990087744404042099705449211168778983<60>
(53*10^85+1)/9 = 52541 * 175067 * 6402222099829371983420008923940695394643962909226217786208391504574124299287<76>
(53*10^86+1)/9 = 443 * 9001 * 36793 * 4013965836196383789993920220979544356972590115738433655970511795097974324411<76>
(53*10^87+1)/9 = 3^3 * 13 * 811 * 2179 * 10120669987<11> * 938077880397239164142789661345371859926627002252542549894617367045613<69>
(53*10^88+1)/9 = 1567 * 285465042967769505037<21> * 23809057250126505138035549<26> * 5529288246970863313600408377307539544159<40>
(53*10^89+1)/9 = 7 * 60378491 * 1393327039706642005745506030069286212935115985707296444095083199859766733556275597<82>
(53*10^90+1)/9 = 3 * 5897229313825441449973864698721439<34> * 332861901496860607555339372758486087133691279567835861517<57> (Makoto Kamada / GGNFS-0.70.3 / 0.29 hours)
(53*10^91+1)/9 = 281 * 4495663 * 17881965103<11> * 30111325271<11> * 69102325406111<14> * 1252839726556988112044594452716952689183542349241<49>
(53*10^92+1)/9 = 19 * 31 * 113 * 1028141 * 1364427553793<13> * 234565544709592041400347911<27> * 26888850934482632471969033477415652203202039<44>
(53*10^93+1)/9 = 3 * 13 * 71 * 1223 * 173350526137<12> * 529702203487223703007275499<27> * 18937690026585875712463325605702669385128109458069<50>
(53*10^94+1)/9 = 17 * 29 * 30135484293233944555519<23> * 3963768350951859104542916561001162854839415963409113623861314968382467<70>
(53*10^95+1)/9 = 7 * 3560059 * 1568511667109<13> * 1061507705848988696999<22> * 14192771800152499469334783233046528884093250660012871183<56>
(53*10^96+1)/9 = 3^2 * 83 * 3119 * 16822831 * 150244402704356279440314955928916906180494447100966813599707335530296503086087667083<84>
(53*10^97+1)/9 = 18859 * 3500039190680569413326057<25> * 892158037428433240908641773985797204502720646531592898996726887174003<69>
(53*10^98+1)/9 = 3037 * 162131461 * 17020649343187069<17> * 70265986427052411186864670575727394409480447078165445858328042905680733<71>
(53*10^99+1)/9 = 3 * 13 * 61 * 67919261 * 99835297 * 104157208797321413909728207463<30> * 3504874880368197865600562776321431847683421350161921<52> (Makoto Kamada / GGNFS-0.70.8 / 0.40 hours)
(53*10^100+1)/9 = 23 * 491 * 120331 * 174533 * 28263217 * 20134338577<11> * 100762164561348650916977<24> * 4330245346732795868373830798852378158636792907<46>
(53*10^101+1)/9 = 7^2 * 10139 * 12397859 * 89683691 * 48776640113<11> * 21855971169264413030077169549855570868975794347668860944302538475705467<71>
(53*10^102+1)/9 = 3 * 2043971 * 4195297 * 316008998813<12> * 1685837176619620275313<22> * 429694294822034983697840099134670328346957991604291524821<57>
(53*10^103+1)/9 = 17597 * 35327 * 660234879222823531615373589467<30> * 143479384203030468046198093958135532280512482215395035709729983593<66> (Max Dettweiler / GGNFS via factLat.pl snfs / 0.35 hours on Core 2 Duo E4500 (2.2Ghz), 32-bit Windows, Cygwin / Apr 25, 2009)
(53*10^104+1)/9 = 191 * 1013 * 31153 * 1103029 * 3306427 * 234505819 * 139345437839<12> * 2107326162673<13> * 389015285048294938891940291366613890345426904005369<51>
(53*10^105+1)/9 = 3^2 * 13^2 * 89 * 3430934531<10> * 52617417479355293<17> * 240975105956071911351886484920661947365374400485205201468003727939096486007<75>
(53*10^106+1)/9 = 2539 * 23399 * 39246889775375307127821459821<29> * 25256206294607461185960920791380183401226405805343740583978930919848369<71>
(53*10^107+1)/9 = 7 * 31 * 197 * 2399 * 1225983469<10> * 4683737401610164689233282572782720186364392224422923334019148477770128316656093515198268831<91>
(53*10^108+1)/9 = 3 * 3919 * 43271 * 5340515626437476280999439<25> * 2167488090490173890462877355606207720161878119853999685328664851990789686133<76>
(53*10^109+1)/9 = 12917 * 14321 * 6102212322648969953669626693<28> * 52168823326169855172881182426610333087041113013430107512982132704223924289<74>
(53*10^110+1)/9 = 17 * 19 * 536777 * 394136903 * 5915033442876753729798779<25> * 1456909700384697444980506942454288599711450922395727730788657014714807<70>
(53*10^111+1)/9 = 3 * 13 * 4013 * 153359 * 15233720632293220949<20> * 16105875532236197082349346401140574946033826688551208176031097491275535009190077697<83>
(53*10^112+1)/9 = 386672227 * 184980971587742311<18> * 24261531333473826408839<23> * 33934786031848053077425615907366054681037300149686444192736313283<65>
(53*10^113+1)/9 = 7 * 47 * 289531175486154600675813449406456787961<39> * 6182186873256482269014449455225313046649108060530092150465438847951149881<73> (Ignacio Santos / GGNFS, Msieve snfs / 1.06 hours / Apr 25, 2009)
(53*10^114+1)/9 = 3^4 * 67 * 1721 * 1979 * 5221883167<10> * 6805051639168721<16> * 163762338583210367191<21> * 127058407204914243037270087<27> * 430894409767738765705964965437967<33>
(53*10^115+1)/9 = 11558232263<11> * 40510266287<11> * 302477825779<12> * 206358822281429953398125923<27> * 2014931384907428956771142800140968401119017796125464078457<58>
(53*10^116+1)/9 = 22419653 * 17579751683282694343723<23> * 39077826451099586894123<23> * 38235021393388129958999552921046839773637940828761207704376784397<65>
(53*10^117+1)/9 = 3 * 13 * 59 * 131 * 3459575258879<13> * 1672766654677514777<19> * 922970064861157287036355835839364279<36> * 3657629278054723987235307833499770126426083567<46> (Makoto Kamada / Msieve 1.41 for P36 x P46 / Apr 24, 2009)
(53*10^118+1)/9 = 6932155488143<13> * 8495032892671621964812576770049606021008482495810497303719449948733897693297086864008236375458477178231223<106>
(53*10^119+1)/9 = 7 * 281 * 122111145041<12> * 533710242503<12> * 35145772660259616219583<23> * 4113731018789437033473190175627<31> * 31773069460948353816154434410162725919869<41> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=1873602012 for P31 / Apr 22, 2009)
(53*10^120+1)/9 = 3 * 653 * 1218916529<10> * 2466181058729646871397018515478744623642697180962412407297264085551470918726012673572586479243231255930837199<109>
(53*10^121+1)/9 = 7507 * 23914464969103<14> * 328024494814439443050208433302400111249720911942406219339353008265581105497789107040723813075935867904909<105>
(53*10^122+1)/9 = 23 * 29 * 31 * 273932137479115188362599<24> * 4502254408284188192537778277<28> * 23092598999104297688126348950481909095221768607019136768796877913559<68>
(53*10^123+1)/9 = 3^2 * 13 * 4423 * 11379693345176802860124888913795387531162646092181098587007095560867510524606010324602532003240421357837892618207638179<119>
(53*10^124+1)/9 = 83921329 * 701715399298417794228316962054889393957153477501397635026596026486769399098635448074099123107176828537699741252773641<117>
(53*10^125+1)/9 = 7 * 1433 * 18307 * 208997227 * 259096480001<12> * 59220205689122677232267433479807231450569316879608139454156923439896513496829464464691482884307671<98>
(53*10^126+1)/9 = 3 * 17 * 317 * 2142846283<10> * 169985901877301709594320880512772392533385220857440244277987409689411908709696223955706253512283951867154937537149<114>
(53*10^127+1)/9 = 11597 * 19883711 * 111454369586241493795989262133<30> * 2291359122139660070004532148593740477997269226745862992180785711814881329696447413242999<88> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=2191162748 for P30 / Apr 22, 2009)
(53*10^128+1)/9 = 19 * 71 * 673 * 941 * 5903 * 921784063808351<15> * 12421340045339931728781770009<29> * 10198734659319124820400947026165352095142553000316341381362596248248760401<74> (Ignacio Santos / GGNFS, Msieve snfs / 2.59 hours / Apr 25, 2009)
(53*10^129+1)/9 = 3 * 13 * 14643271666013<14> * 989072199016289802344803962923<30> * 10931462574095153368015708621042439<35> * 953727634216619886094497007674560185474261384299191<51> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=3274009842 for P30 / Apr 22, 2009) (Makoto Kamada / Msieve 1.41 for P35 x P51 / Apr 24, 2009)
(53*10^130+1)/9 = 97 * 3312111581501<13> * 1271121747386539<16> * 98252130102177803<17> * 21238910222340390665954881<26> * 382125981660833345278868179<27> * 180837604891909980515848530736439<33>
(53*10^131+1)/9 = 7 * 97738343 * 17703811623274986542609<23> * 48618725314158859858307753045210207726884844615861587846310076208919212530005063745709509326414258521<101>
(53*10^132+1)/9 = 3^2 * 4643518973<10> * 79593488079649<14> * 48429621795706069003<20> * 9801800613944284483825203726457<31> * 3729487427193358725267514399562862082318669990920751080263<58> (Makoto Kamada / Msieve 1.41 for P31 x P58 / Apr 24, 2009)
(53*10^133+1)/9 = 262918391 * 6902507297954552900544343980154530186562139765296085565049<58> * 32449313991032259990721014237413613972619180694610646930008757342471<68> (Ignacio Santos / GGNFS, Msieve snfs / 4.06 hours / Apr 25, 2009)
(53*10^134+1)/9 = 379 * 1307 * 27011 * 44012688661595418101936834495679255490917159915500366891612081274224804369901225574876216642282442577338282302175931372354283<125>
(53*10^135+1)/9 = 3 * 13 * 313 * 1549 * 3049 * 74143 * 186300199 * 1309189589<10> * 315255488283846235436795881<27> * 10488199912154755864745774983<29> * 1708307093986891448752835264729085167873848025113<49>
(53*10^136+1)/9 = 896561 * 25627855753<11> * 27385866116897<14> * 93586836099717041427108289838291357933950217423756553739593722078855100436818932695724579721153796926904289<107>
(53*10^137+1)/9 = 7 * 31 * 83 * 563 * 36467916497685454043561178729676819<35> * 1592488069431850510302639201300386274192150371140061427937716746570830122530356070413043274127267<97> (Robert Backstrom / GMP-ECM 6.2.1 B1=2328000, sigma=2561432034 for P35 / Apr 25, 2009)
(53*10^138+1)/9 = 3 * 568606156271<12> * 421748910868721<15> * 633237938276842858605725159374066027361003<42> * 12926461350690842029880554414352022638905256637045133099332495876548231<71> (Ignacio Santos / GGNFS, Msieve snfs / 5.99 hours / Apr 25, 2009)
(53*10^139+1)/9 = 657413 * 20410696260847223<17> * 3823221382006965053370031871<28> * 1147909912481955400864275487581850051490198848660755509554577765803385411796416171962164541<91>
(53*10^140+1)/9 = 577153 * 11923297 * 3492350119576818700587648285417907<34> * 626497419541031597886693211292085596727199999<45> * 39111905731165024668312789845345170825587785659453<50> (Robert Backstrom / GMP-ECM 6.2.1 B1=882000, sigma=3328769994 for P34, GGNFS-0.77.1-20060513-pentium-m gnfs for P45 x P50 / 3.36 hours / Apr 26, 2009)
(53*10^141+1)/9 = 3^3 * 13 * 349 * 48072954790560648567652706462002864422476011142041068815981264246148041117795972937647563562877157273846226409104473415202482378540958611<137>
(53*10^142+1)/9 = 17^2 * 6379 * 2008796784103<13> * 24838614894526801<17> * 2068776505732953917580438564404929945073177<43> * 309461026129065613336287718747252395686825797638200927646978423349<66> (Robert Backstrom / GGNFS-0.77.1-20060513-pentium-m, Msieve 1.39 gnfs for P43 x P66 / 9.15 hours, 0.45 hours / Apr 26, 2009)
(53*10^143+1)/9 = 7^3 * 79473050106862706275240784169605362262487122995225933<53> * 21603263304638811935007782608993962985407454791157017884866832547047245476678698092370731<89> (Serge Batalov / Msieve-1.41 snfs / 6.28 hours on Phenom II X4 940/openSUSE/x86_64 / Apr 25, 2009)
(53*10^144+1)/9 = 3 * 23 * 3347 * 6111936759569<13> * 30640070353597<14> * 70182313997449<14> * 1940136399326423063282783178301205687477619526249111882137772299752626865214823286295311297673328939<100>
(53*10^145+1)/9 = 4013 * 2086472299<10> * 2895230432243<13> * 57968818127543191603945489<26> * 600768533553563816773369126147<30> * 69753630841413122154141893581212807753891601974141248210480679263<65> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=3838722880 for P30 / Apr 23, 2009)
(53*10^146+1)/9 = 19 * 541 * 1172317 * 235060575725579<15> * 9237495928744902899345213964123421<34> * 22506262284520226043638845786993481451478146780791861537970684431898609724245820689195797<89> (Ignacio Santos / GGNFS, Msieve snfs / 8.46 hours / Apr 25, 2009)
(53*10^147+1)/9 = 3 * 13 * 67 * 281 * 8020244914067615507037613586718595482604618420202421902108522387908376116800188611948318752376754182671216718064330535781112081106769586081213<142>
(53*10^148+1)/9 = 5651 * 26801 * 108707012291<12> * 773474143085751735235970207<27> * 4624381918247184898467027790292655461967775554945190578975688734704415260947274004961992156153800781647<103>
(53*10^149+1)/9 = 7 * 89 * 181 * 13860095467<11> * 127907351040860227747<21> * 298749405551037697759977109415955797<36> * 9860477861640212173667954263879056032708182342505378235882532507138565347054351<79> (Ignacio Santos / GGNFS, Msieve snfs / 11.63 hours / Apr 26, 2009)
(53*10^150+1)/9 = 3^2 * 29 * 1049 * 21508858606039281669054961626978764263315505330341572849489529852875348859482626726745372856063935690947733067759803676878504574284901471165345901<146>
(53*10^151+1)/9 = 11005133755709399739846139646663420523079<41> * 5351037997001869599349449652602850650625326819936478162439626755570976783012160572839424777050332270827075435391<112> (Sinkiti Sibata / Msieve 1.40 snfs / 17.28 hours / Apr 28, 2009)
(53*10^152+1)/9 = 31 * 625913 * 6958847334209<13> * 210814408739207324962612124821<30> * 20688075617540906499953026451261388295816455794590976409066846398452495743997943095566505674959763304867<104> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=2236419490 for P30 / Apr 23, 2009)
(53*10^153+1)/9 = 3 * 13 * 151 * 1104819812890349325391<22> * 5337056004796930905390628567<28> * 7961885334239550480336605084633<31> * 21300150554817246934507773260046199194433393097835926658634652295145801<71> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=1149936533 for P31 / Apr 23, 2009)
(53*10^154+1)/9 = 37971697959006556067063120880293<32> * 26750290160545884056238066771927664782732542089391686301<56> * 57975545719181940975342922884870737353678736928569607670017493537673<68> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=3638990105 for P32 / Apr 23, 2009) (Ignacio Santos / GGNFS, Msieve snfs / 15.78 hours / Apr 27, 2009)
(53*10^155+1)/9 = 7 * 1792927 * 3543577 * 2443577634254454687137637845111973397935401399897115454809979896223<67> * 5418819651805614652357594463326606111851486150836128615586608425053563039831<76> (Robert Backstrom / GGNFS-0.77.1-20060513-pentium-m, Msieve 1.39 snfs / 15.04 hours, 0.56 hours / Apr 27, 2009)
(53*10^156+1)/9 = 3 * 179 * 44685583042943812043<20> * 245409655404229865935923126115924253478108340640902509581247220049249609428727409457446715077100214642440526375334467256534947889875779<135>
(53*10^157+1)/9 = 21817969 * 2699100401549240852294220827286393563437957441817287800202158545962224480605361978875709690892350653211070603725254577494765387598125604124237635908681<151>
(53*10^158+1)/9 = 17 * 89803869709<11> * 19946527811963839934482153629736138114375201<44> * 19338468652164063844346333500613745540736302026055121157305398505959820677361605766269700887682845416813<104> (Erik Branger / GGNFS, Msieve snfs / 49.58 hours / Apr 28, 2009)
(53*10^159+1)/9 = 3^2 * 13 * 47 * 61 * 543172787 * 146740646009623<15> * 10377904187206720222921982134102753<35> * 21223730306600451520506577284963975239844497432815229537295512873899546101677447590414810139556667<98> (Erik Branger / GGNFS, Msieve snfs / 35.62 hours / Apr 28, 2009)
(53*10^160+1)/9 = 40237 * 51203 * 76558171429<11> * 204704040097<12> * 1823872158981217353941763837536806078314542256882291211623390720958882471141621110941056108695374587342474744601398818839047814323<130>
(53*10^161+1)/9 = 7 * 709718732680925963273434075511<30> * 118535668079661328446835390169781367112696291073297653940264980679589480803529870838577090978612622055485143543597553998658585880057<132> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=275210792 for P30 / Apr 23, 2009)
(53*10^162+1)/9 = 3 * 1723 * 2655315417745817<16> * 171350162476640484283<21> * 26342549352212524177658708353759886900127603649<47> * 95053560209664005393787353568489591164108220293809699182000297998744547765379<77> (Ignacio Santos / GGNFS, Msieve snfs / 35.93 hours / Apr 26, 2009)
(53*10^163+1)/9 = 71 * 125441 * 543667994926069758106471<24> * 141981755621425466912511299686577381546348961449<48> * 85658249428232845412735044023039818341069505361385323720612300437103972695570075959681<86> (Robert Backstrom / GGNFS-0.77.1-20060513-pentium-m, Msieve 1.39 snfs / 34.15 hours, 1.07 hours / May 5, 2009)
(53*10^164+1)/9 = 19 * 7275791921399<13> * 4259900830262339947382269071322731189406204336971245580037338324583558103583280355806356885646210009228050865985198334983490465234779403356022494070869<151>
(53*10^165+1)/9 = 3 * 13 * 150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997150997151<165>
(53*10^166+1)/9 = 23 * 909518249142631<15> * 101908807772549968092207768219787<33> * 27623734159715430740229212625948447694972356799499723931346911102607938595696028274216199990446929662922041541312235019<119> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=183289767 for P33 / Apr 23, 2009)
(53*10^167+1)/9 = 7 * 31 * 5801 * 2171422861<10> * 135266161385821144300657096869448610669383<42> * 1592711769493037551738175961976900809985538358919210031942464262455167074834538118938696628704611091433213992059<112> (Robert Backstrom / GGNFS-0.77.1-20060513-pentium-m, Msieve 1.39 snfs / 43.70 hours, 1.36 hours / Apr 30, 2009)
(53*10^168+1)/9 = 3^3 * 97871 * 49048796603<11> * 458386770874262077570867<24> * 15411402341570770700756659<26> * 1367038993699028857971861131191<31> * 45066025056904692418507137599401<32> * 104395751098716970128892501976970215911993<42> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=4041292653 for P31 / Apr 23, 2009) (Makoto Kamada / Msieve 1.41 for P32 x P42 / Apr 24, 2009)
(53*10^169+1)/9 = 9851 * 38047 * 5043595148840315585593<22> * 31152464110448827547829360077099558730718457895031237088310904127147226554013552023052876542623250204039132573785960626801130941041464684909<140>
(53*10^170+1)/9 = 1559 * 2903 * 370723 * 33658580232709090033<20> * 67871489825328151030318753<26> * 15878422731457635314161599067107119872220986892417<50> * 9676095432618857994298840083734799477765342988159463785324899923<64> (Robert Backstrom / GGNFS-0.77.1-20060513-pentium-m, Msieve 1.39 gnfs for P50 x P64 / 18.46 hours, 0.99 hours / Apr 29, 2009)
(53*10^171+1)/9 = 3 * 13 * 12517 * 811991 * 41965866407<11> * 3955013221717<13> * 19945568457173<14> * 194033779430545213<18> * 23128602404611901024778204483779271141862203318066047959981787271320406471696008251310554054505593403523943<107>
(53*10^172+1)/9 = 807379 * 603812754341<12> * 28759572858649<14> * 9993027152629419597904559069<28> * 35301764274656969995635746440541350381<38> * 11906324612627081905737388568432204863860375854067088525617352372196014894391<77> (Robert Backstrom / GMP-ECM 6.2.1 B1=1172000, sigma=1695054277 for P38 / Apr 27, 2009)
(53*10^173+1)/9 = 7 * 109 * 337 * 32117 * 927467459 * 1355939609<10> * 13693646389597<14> * 42233535190407367625899<23> * 98045660498502488205160495288316797455301845182847830077344500910458853238840815853824831792996948758790713699<110>
(53*10^174+1)/9 = 3 * 17 * 24611 * 190335731164766587<18> * 24649811293360697678224251957551845936540585639257504363540365080187932709810863024825847934510206585477348379835972682442952396800510998042158817248627<152>
(53*10^175+1)/9 = 59 * 281 * 66449 * 3359701150017343<16> * 877747172492967495127142302830627916616575312789<48> * 18126605868851081779459191764965506287093068015187871080859858686135207440387014241240173116363942999017<104> (Warut Roonguthai / Msieve 1.48 snfs / Oct 12, 2011)
(53*10^176+1)/9 = 8294092389637679<16> * 71001004235812960813258179375514456464645755202350212011510956903521007234057290715921210098597922376534195650824807751061401434191307207988132563808390018131991<161>
(53*10^177+1)/9 = 3^2 * 13 * 1259 * 217157 * 408533 * 155122246988641<15> * 7672904306658443636134196446552695609599<40> * 202237566619332517092399359185855046068999439<45> * 1872082966737778087575829276904880609418952516992931569614440023<64> (Rich Dickerson / GMP-ECM 6.3 [GMP 5.0.1][ECM] B1=11000000, sigma=1403904305 for P40 / Jan 18, 2011) (Dmitry Domanov / Msieve 1.40 gnfs for P45 x P64 / Jan 20, 2011)
(53*10^178+1)/9 = 29 * 83 * 56671 * 397302042061058419<18> * 764648480363550491427385880911<30> * 561805943477853761856674267872978066478843702421886731769<57> * 2529457794411425253963747749161488771720116899521120577840536881597<67> (Serge Batalov / GMP-ECM 6.2.2 B1=3000000, sigma=3079772143 for P30 / Apr 25, 2009) (Markus Tervooren / Msieve 1.42 gnfs for P57 x P67 / 46.33 hours, 0.17 hours / Sep 21, 2009)
(53*10^179+1)/9 = 7 * 4013 * 17839 * 17981 * 65355450688973339109195516472625633024179205179574210025458709602040136358096011438153413550486408411577605057960613680960406007640812179093999545682063307437389801081<167>
(53*10^180+1)/9 = 3 * 67 * 7753 * 467712874948997340147347573908507417<36> * 9277642778843380347719533680822774228073<40> * 870864419203635722315194328196734611935239863623475289867757749407372405846045984600645870268689193<99> (Robert Backstrom / GMP-ECM 6.2.1 B1=746000, sigma=338678068 for P36, B1=2958000, sigma=314658206 for P40 / Jul 6, 2009)
(53*10^181+1)/9 = 293 * 176243 * 1440161363226367<16> * 4648807088243344680150847604995364064982182624096839807<55> * 170333936382444592738468589628119896338483495405780157358429917327344492289792089987302875715502391722919<105> (Dmitry Domanov / Msieve 1.40 snfs / Dec 11, 2012)
(53*10^182+1)/9 = 19 * 31 * 88883 * 48676801 * 1909934179<10> * 44909803185561712575377489171512594879<38> * 2694125231951175852624904324678327290468308136743054314646170986495012520044492807970631334790960472860374888200542723067<121> (Rich Dickerson / GMP-ECM 6.3 [config GMP 5.0.1] [ECM] B1=11000000, sigma=3646388374 for P38 / Jan 19, 2011)
(53*10^183+1)/9 = 3 * 13^2 * 313525843121228417<18> * 3469107172146883252031<22> * 8038653128004913635470223675890713077591034477<46> * 1328467855967764884021265231529515948155546983268589438361051105440036980079613101480144416458713<97> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=761703653 for P46 / Apr 23, 2009)
(53*10^184+1)/9 = 3570571 * 2272384007<10> * 2393510226170387<16> * 152937048474146144538304996869595333<36> * 597217258688036676171387508287998767084972633927<48> * 33199658864400082603893441773353482637236315580934201587427733438557861<71> (Rich Dickerson / GMP-ECM 6.3 [config GMP 5.0.1] [ECM] B1=11000000, sigma=3640547026 for P36 / Jan 19, 2011) (Dmitry Domanov / Msieve 1.40 gnfs for P48 x P71 / Jan 21, 2011)
(53*10^185+1)/9 = 7^2 * 902829978413473489444924337<27> * 13311632175405183534967107570874937014132001247606973952111223566548486506432888017839423416087662945400355395097519522519423359320799623493647770043920548953<158>
(53*10^186+1)/9 = 3^2 * 12547 * 252766620829<12> * 75886207539634421<17> * 232428550344764604099332747485313915067865339<45> * 11697118980019449831167863246663311895695297844557316111440541051951869225648033338635044661069754040490609793<110> (Jo Yeong Uk / GGNFS/Msieve v1.39 snfs for P45 x P110 / Nov 3, 2016)
(53*10^187+1)/9 = 7321 * 55786707677<11> * 144189030451384347979850386170617801260861566274931789334515254541198062946517225792597836594847884336650788027040032563064297856759509117447071628707979977133530322145722517<174>
(53*10^188+1)/9 = 23 * 149 * 9133 * 1021637597731<13> * 29078929780665430520713512844261283<35> * 643666395509113163554290290988549439459048058041177<51> * 983942401058070351599558503204902675754844350912910853845166431059245258357732551999<84> (Serge Batalov / GMP-ECM 6.2.2 B1=3000000, sigma=1241649351 for P35 / Apr 25, 2009) (Robert Backstrom / Msieve 1.44 gnfs for P51 x P84 / Jun 1, 2012)
(53*10^189+1)/9 = 3 * 13 * 381181 * 1890738045310576852074564977329988351713715534194259398856686243072087<70> * 209510669633689530535928051322848872898733253543389021708070065889120663421372122513377077630086617651858174351533<114> (Ignacio Santos / GGNFS, Msieve snfs / Aug 6, 2010)
(53*10^190+1)/9 = 17 * 9030767258774743<16> * 383583386474261498769543417440237420042364019196560588070819348721018100018451633622859069127957672393253728421618883438420675033513101953792811644738434616583909902273409919<174>
(53*10^191+1)/9 = 7 * 2939 * 9281161402879<13> * 289132267042019139658590673019357<33> * 10666866194765111497479208943782071594321661029391739223722554877106913319364559945036795750954746506208661585455768910994186498145902988274831<143> (Rich Dickerson / GMP-ECM 6.3 [config GMP 5.0.1] [ECM] B1=3000000, sigma=4209317769 for P33 / Jan 19, 2011)
(53*10^192+1)/9 = 3 * 50917482587<11> * 45346311841468819589552951241702768145726819056106421268431<59> * 850164980128810393064917194842564196232419766587115961430651991559753632332316859367392383848370550774581042232907367068679<123> (matsui / Msieve 1.48 snfs / Feb 17, 2011)
(53*10^193+1)/9 = 89 * 14243 * 476308962166363018339<21> * 97533346570587085006508626150961498766146271648119052044720528023443950258218246115560813815745124060877141512421934015103219101904577898755107966644562980231512997913<167>
(53*10^194+1)/9 = 285029662361<12> * 237666183667050370931<21> * 4265546019261343047945983746912979<34> * 2037986381238047661211739099652131129212450743883141917946588295407384024750315890053816689152359562661517483962891574865553202201<130> (Rich Dickerson / GMP-ECM 6.3 [config GMP 5.0.1] [ECM] B1=11000000, sigma=3034660976 for P34 / Jan 20, 2011)
(53*10^195+1)/9 = 3^4 * 13 * 25951 * 6741108811<10> * 798807315484773786106083395471<30> * 40020040194252306342776629924366714161501093035240199502391871405295913297825890367123716177967704294723670730999957297653020507953068707764259704023<149> (Makoto Kamada / GMP-ECM 6.2.1 B1=1e6, sigma=633471676 for P30 / Apr 24, 2009)
(53*10^196+1)/9 = 298128395003<12> * 27913268210687<14> * 62510512638626489<17> * 35185515469066280073861700339946057262331008075400003741<56> * 3217379950846685362761206160385882043229249449542389854966873122001670528691831389461707177562636401<100> (Jo Yeong Uk / GGNFS/Msieve v1.39 snfs for P56 x P100 / Oct 20, 2017)
(53*10^197+1)/9 = 7 * 31 * 877 * 2016361 * 1534637280296163799590453278654487927123068041204484280329882668362634788584617226332569031757358688658838571458412071170780459912630912670375459477293726025265998849320481558438956769661<187>
(53*10^198+1)/9 = 3 * 71 * 87424468960331558703235771<26> * 19750653502922749744625229280562727394089621601681<50> * 16011767813038998152523371361240413599302006081965673664903638316470881533500041367759429821958576693533158335989521047103<122> (Jo Yeong Uk / GMP-ECM 6.4.4 B1=11000000, sigma=8259005656 for P50 x P122 / Mar 21, 2018)
(53*10^199+1)/9 = 191 * 367 * 631 * 2897 * 414154471091467<15> * 1109669680513934529799681542071894844271452656655571319527907875508943470558965243558805636667142101372212113843263294877136457491116914696529779021472899078562221986662281773<175>
(53*10^200+1)/9 = 19^2 * 134789 * 23765153 * 39853057 * 320495311303165535602444090245792286865527452470616096560243<60> * 39870141007055613317761578874832819150667811960278186650167934533057155387230983243145006692879144331663822471741743247<119> (Robert Backstrom / GGNFS-0.77.1-20060513-nocona, Msieve 1.44 snfs / Sep 27, 2012)
(53*10^201+1)/9 = 3 * 13 * 405683 * 62635489579154110232271623867118103<35> * 5942394329616350083543134914418678468815254638488449610157480904899597258932565815669787572083517683998758043054391994015670908338456661773435238069120916598499<160> (Wataru Sakai / GMP-ECM 6.2.3 B1=3000000, sigma=303242967 for P35 / Jun 20, 2010)
(53*10^202+1)/9 = 2854678590966455857<19> * 20628903399227148852235095793125856952836972129557823323336715016270506263289839510225646595696540865171744597385238038947781753885158432385498437684708120476762046447638988564475184777<185>
(53*10^203+1)/9 = 7 * 281 * 6991094456219571760445366554492296155281<40> * 10426850768815615181836931021647259711766292183587961367<56> * 4107056453395310217669256819210342286558341010130398838478449929781165334599964077814447204007952661851121<106> (Dmitry Domanov / ECMNET for P40 / Jul 1, 2009) (Bob Backstrom / Msieve 1.44 snfs for P56 x P106 / Nov 20, 2023)
(53*10^204+1)/9 = 3^2 * 113 * 4931 * 106031 * 80522381 * 78406560485739517133849<23> * 1754185578785297999300817145151437432033207222550657121395777868027560331008506157635994381698346431466570274947685892318968021335311623130575438262059108599699713<163>
(53*10^205+1)/9 = 47 * 197 * 317 * 946474730253881<15> * 15947952781883519<17> * 5893032166055217751510000561<28> * 8420794288736398704499222545435687464025833710301228005343071<61> * 26785772730178987921182557831235743663167052364206528013347199524391764791403407<80> (Markus Tervooren / Msieve 1.48 for P61 x P80 / Dec 10, 2010)
(53*10^206+1)/9 = 17 * 29 * 12528143 * 1713847868093<13> * 10609272425840892326334191<26> * 5243748681556153981241899450270556988908895870754775843847719445512266963532543404500340680593046242345140717399334020692988821724189534570485738593204893535297<160>
(53*10^207+1)/9 = 3 * 13 * 419557 * 54266615209<11> * 11090434008429949<17> * 15099045892584566217708469463<29> * 39604724869727488616794225499398102849378553089205398896498011721931696445079918556746820666755210217849489354902130319876912084493258919632174721<146>
(53*10^208+1)/9 = 51357889931<11> * 11841060582919322283639313802969<32> * 96835719745119502114133639892545642590497609279589740567205770747407925799281756271578814646457784646501577579948464336312316268708406997812209128513972375533910141251<167> (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=2892106737 for P32 / Nov 21, 2012)
(53*10^209+1)/9 = 7 * 193 * 2131 * 121447 * 137301304687<12> * 50165769690247<14> * 25022678661191441<17> * 18834647593731399751633018803354721<35> * 518841048811895344330022166150216464171197717212269097672078198066007567906723524882959622815335905312943668595490930115563<123> (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=1418661596 for P35 / Nov 21, 2012)
(53*10^210+1)/9 = 3 * 23 * 269 * 2647 * 3383868951223<13> * 35421301332930557713761492929497633699798751168747529392054935216594477220833234325927178375168983883636075129791595447919966784732308365293848323089400809590409210132498772231385095499640329<191>
(53*10^211+1)/9 = 487 * 156971 * 35666258660257<14> * 8500096737484501190631368771184048532729<40> * [2540993480397853921853906421106724466491207225464665125916594955712069168638455078380714215608693106513476283406648200799481730822240676019603509432869<151>] (Serge Batalov / GMP-ECM B1=3000000, sigma=3592708182 for P40 / May 26, 2014)
(53*10^212+1)/9 = 31 * 2100523 * 5559311 * 1533232391167149037<19> * 198875916428173045618079<24> * 5334983436796576754273814526503249725058423536064420521078660133953300373441007050194559515276424783479869364978337370130559503775813921854506639921863485401<157>
(53*10^213+1)/9 = 3^2 * 13 * 67 * 1459 * 4013 * 30389 * 1972967 * 324112153 * 136048743937<12> * [48531326431869436672006276717696126131308016347768014464322249983310673094457730677893649022847588144293180005770381276459462003084256102694110831668910807306744951675079171<173>]
(53*10^214+1)/9 = 18371 * 19584538047640970902409<23> * [163676839676049597425049410437887055581041629156493459613952156513944263873911819290700256468608971137979699724038869122588201474104566849054805876564950579635834379010771775578456765945851<189>]
(53*10^215+1)/9 = 7 * 47221 * 1332283 * 21798141940706552012847325771916531<35> * 40584334693224583909044125231917481<35> * 1511561239267999287811058881760452683429463623353170121398087999595290751722933107831998537483607279497080463861053759164450349833373099<136> (Serge Batalov / GMP-ECM B1=3000000, sigma=2996072668 for P35 / Jan 9, 2014) (Serge Batalov / GMP-ECM B1=3000000, sigma=2930894750 for P35 / Jan 9, 2014)
(53*10^216+1)/9 = 3 * 283 * 48463 * 40697198551349229781<20> * [3516825827561496232731892882083746740178685631222699095896235642891873349064039069308114109448380287086809467901115642234889919367977075817817559042724922844104039080233029709156276505804587<190>]
(53*10^217+1)/9 = 4253 * 663001 * 805413863 * 3216085788313<13> * 96991767770476269459467<23> * 369191102343354125563549<24> * 225159858928044977120859177528655377230361787783643813781294013278391395983004587778737931773930489828158198321575011666519224764103338959269<141>
(53*10^218+1)/9 = 19 * 167 * 97162097399<11> * [1910145311796756461822631285545582476697342117606946537560119143765341651747783232049702882579418567685516785086424000014887112839994133006788717046200637101295131591680693888952036518402529404273902291107<205>]
(53*10^219+1)/9 = 3 * 13 * 61 * 83 * 691933733467<12> * 120784087402691<15> * 13929140945227875048449514477176102811848204379237043<53> * 25619005474393456279163185995359371360921277261810487912918890220947432726837327129973330474086050960263555374692099737662707709862918787<137> (Erik Branger / GGNFS, NFS_factory, Msieve snfs for P53 x P137 / Mar 10, 2021)
(53*10^220+1)/9 = 43627 * 4489189 * 300683862351758915462391139620931161813107531729592153826456048687775833244137339167543327823336349966177685549704961003530079349937810397841974627288838392984625534238975999443634805214352690567671441508344463<210>
(53*10^221+1)/9 = 7 * 2767 * 210869 * 7193297 * 44242369537<11> * 5529288520801<13> * 2300816346720928660787791<25> * 30525013613925696965761734468007<32> * 10829929985639582701673419322868264622074601643944151851640209<62> * 107724461016875307851244608422041625825543237405653555649770620677<66> (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=2732152245 for P32, Msieve 1.49 gnfs for P62 x P66 / Nov 24, 2012)
(53*10^222+1)/9 = 3^3 * 17 * 2957 * 11784526031215803622813427572959987236977427<44> * 368177487777333387771027802279764674907520624181068681269980980978848890232949723599135175045376234117449983928274035587682668637764105781784559729277989299905507279482754189<174> (Bob Backstrom / Msieve 1.54 snfs for P44 x P174 / Jun 22, 2019)
(53*10^223+1)/9 = 827 * 27997 * 28183 * 393503633 * 585244054874062819423<21> * [391871226053753649059431697970512768178741870220839791863958298124384032333429627093797821957762977285406398417695757892780263378528863642745653408986943321650480477012550689271107823<183>]
(53*10^224+1)/9 = 659 * 1811323 * 5593268497<10> * 12177431867<11> * [7243203181259068919916520034636899321155522047159142437530019705428988395831245561042844105500268979717709711795648739379935834539446167661456415729291913042367260807715223838796137584490385750923<196>]
(53*10^225+1)/9 = 3 * 13 * 883 * 1527349 * 3461184127<10> * 88518468264268023564917<23> * 930826781184951699243961<24> * 1149925007150117522324893<25> * 5642046998075218888787798681<28> * 5136607994888678941350600111352461019309<40> * 11780389760118713821533110004193072752480565748778947324590292755451<68> (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=1414789021 for P28, B1=1000000, sigma=448328688 for P40 / Nov 22, 2012)
(53*10^226+1)/9 = 97 * 10831 * 11273 * 106735337 * 46584918219734275170505236719384396506268800512080386142754329113666437034869390135257402404419819243194613835822768932871607048611894830477383005780415391107094466819759534335576654143234654440817905896459527<209>
(53*10^227+1)/9 = 7^2 * 31 * 1015277 * 281066641 * [1358569107620769494912746262476582508984530061203191064589411993830895012105594527924692253220444119643426364649087164077499176358430733051831355942577370093905123705280043793431806611594807370970548032621602083<211>]
(53*10^228+1)/9 = 3 * 151 * 6498043463<10> * 3009086564565667441<19> * 1292045837902658641488924243281<31> * [514564645201610900042110754243109514196670210349237517324326495661177740453815672387732585708335770476140580274940056900746771546522074501378626648621641892847393121331<168>] (Makoto Kamada / GMP-ECM 6.4.3 B1=1e6, sigma=3767127668 for P31 / Nov 20, 2012)
(53*10^229+1)/9 = 4651 * 137428043994126823776288620369<30> * [92132245337432823303540570962786963560242072659691596795967149956491750633635852727057845012258572112028143356361744296936178477212781934191582782898914347456655098236443620753264491491931700351931<197>] (Makoto Kamada / GMP-ECM 6.4.3 B1=1e6, sigma=4071731325 for P30 / Nov 20, 2012)
(53*10^230+1)/9 = 28901 * 379645261 * 54572358779<11> * 169990702043341710577<21> * 4886412761034868835327<22> * 701785782277807468086932243207<30> * 1687135248139191242350559551224024984665348535304429421075735056517714254104220837941386274997480369546795206461643315476402401167783427<136> (Makoto Kamada / GMP-ECM 6.4.3 B1=1e6, sigma=1618565347 for P30 / Nov 20, 2012)
(53*10^231+1)/9 = 3^2 * 13 * 281 * 709 * 606048882728593<15> * 10645153168711643<17> * 39159340919167904635979122800863917207577331372138943988931502687452849445434241256083986403338931794977680626774220900101628336731773141867197803286862483525889117471672426856147807494031706027<194>
(53*10^232+1)/9 = 23 * 80722247 * 3291479783328483206711<22> * 121340354397766391804134027<27> * [79417430318865785392347860477159902572137928901339294984963855597401328047426699555259328273233699572656721313249601630878918579843876430976948015106204282262465694199591186477<176>]
(53*10^233+1)/9 = 7 * 59 * 71 * 755437 * 2291664830139086923<19> * 11600470607764156191160208124961599049232465510936607563537804955830166626002280369439633591686044207052095464520232376321672575496457134732269548538305151180177642520549046117083265522907153362111496763493<206>
(53*10^234+1)/9 = 3 * 29 * 593 * 1601 * 10193 * 7043478571529258279<19> * 14421388802015928979237<23> * [68860754155469239386779694329946726567605991018286474057706105326808724187870374205956219860732589470620665252690989633177720540548870853603858361161316329443458142549124271039196261<182>]
(53*10^235+1)/9 = 22436383 * 195501353 * 64746781865343031<17> * 363654776706491191<18> * [570194815133954629455213618282738173169573363537292525149087093765979667664794370596901214098082443684327269316819913843609046696405008937557012998080358447159440971586159527428513346591<186>]
(53*10^236+1)/9 = 19 * 11875087283454541721822025107730136093<38> * 2610014672478872184790227495580788896387047421049588572208909960435671208519301722922970129552461344152408015885640490585469187687580693912948017175750646069419989953494726583983792035209334556177567<199> (Serge Batalov / GMP-ECM B1=11000000, sigma=1730829493 for P38 / Nov 8, 2013)
(53*10^237+1)/9 = 3 * 13 * 89 * 2777317 * 20717819 * 10334242506412224251<20> * 2853189458737698058384578197647428245299781899624820165774074825060741638697740568873516174862233429349916381822724414318499780849865952542480807101750785045937254241055990259119384638254763388003080483<202>
(53*10^238+1)/9 = 17 * 409 * 1845721383149792983591349<25> * 4588756229749121818805687132279078240220774512414085339008876731542336142812571259487394958557161130103485229941911173994703256065892554528552444662765335933002923139297245782597028503908800813302102842738995437<211>
(53*10^239+1)/9 = 7 * 92993 * 99510701 * 513950257427<12> * [17688629608418102592208142938163179666410292644582269246372413237853820550244689771697074168824290515925810623883438538589084955624093160489211353527933503737738638041219366281644288317583718224741307462821556485657<215>]
(53*10^240+1)/9 = 3^2 * 1487 * 444523 * 989887056442075962752280388659342270414579960868326894588040758296456792063766160549833121113006841758420760813258080590020490087000002522400313842861981086485345841700974458495612361323624430163557173799606388449269447860613314621<231>
(53*10^241+1)/9 = 84130817 * [699968109056743011171386685676532641884232372174501632248369689419382304214267750292843214501160601933639713600890014997582739377045261415788805294603152241929243227114850066045226791139908802845560015052378356065279728460130000745017<234>]
(53*10^242+1)/9 = 31 * 1327 * 2420279 * 128105207 * 148620931 * 183404219 * 5706591061<10> * 3913003684463<13> * 75856398648286332987409893758353714363323690730140157147554984078135616653408540389833897910299054650161295177445943627363951873405349762982066560134840037307872229998196921417897206187<185>
(53*10^243+1)/9 = 3 * 13 * 359 * 11239 * [37423692270610371403942140144495601431395786557292663789613701145893192043671336206457517273094051230073304024410906757768474120779971799637949220047568888069324150310548400565727318645244461164502822071559662335514725756524546601182351<236>]
(53*10^244+1)/9 = 4165188735276958847721222676363<31> * [14138348255417805994663292123114962135085631860915288045171250131192220108663053275529995182181048068200797649591095264501549384901015814904445501705617476587022155504724330270053687125165329754670408637689884934603<215>] (Makoto Kamada / GMP-ECM 6.4.3 B1=1e6, sigma=862714314 for P31 / Nov 20, 2012)
(53*10^245+1)/9 = 7 * 39087019121<11> * [2152299817659562348495287910266431160736223288808520011165242935921762970401852970889387024027367096469360027464218256291525275254488601988066834760944474197683010981403821003445277899297091476051906530009449859887845401578330478288687<235>]
(53*10^246+1)/9 = 3 * 67 * 6727806433<10> * 2278583036179<13> * 3118847617632547<16> * 126503517408354377<18> * 1400470655850621696350575187<28> * 13964945657271615602866061911036908099103790113<47> * 247678856670480126409996679407170328410887087306398042853679070157882059491043586522332722816692710040698153130426443<117> (yoyo / GMP-ECM 7.0.5-dev [configured with GMP 6.1.0, --enable-assert] B1=110000000, sigma=0:12013291993586279958 for P47 x P117 / Jul 8, 2022)
(53*10^247+1)/9 = 131 * 647 * 4013 * 116833 * 145757 * 1154751529<10> * 3569740181565718002071137215977<31> * 164809478774078763104962559788600467123991<42> * 14965331278509232286670639743454859591896464396400806320968931871748707222094017751935787860248817814236311278134334519172571165378486737319827744603<149> (Makoto Kamada / GMP-ECM 6.4.3 B1=1e6, sigma=4219447995 for P31 / Nov 20, 2012) (Serge Batalov / GMP-ECM B1=11000000, sigma=2104215373 for P42 / May 27, 2014)
(53*10^248+1)/9 = 40933 * 50881296683265419494298969<26> * 42140641599307298274730876079835433386709<41> * [6709659335213395653225786238249025632792580949080901462929168162933939923423491314796314222494434014010907153895439862698586256261287833749731762698717602490049486272842294501273<178>] (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=1893284577 for P41 / Nov 21, 2012)
(53*10^249+1)/9 = 3^3 * 13 * 766386608244001<15> * 691576107414992186771095861<27> * 31654711193626434851368598387839583536537653420748281352501186692626497429564114005729420842105439224545346606312768156896659025689562776624036974440223556419206755118381646890588942066628952640279087009099<206>
(53*10^250+1)/9 = 409781 * 19672573552477511<17> * 2586181290944158375038495565279<31> * [2824628904155215356982184093858537775770124606556535454165996390211070694722843374813315814424883700045985457430275192046422323087141587709068550490576251131961790486595984308449872282766585290501501<199>] (Warut Roonguthai / GMP-ECM 6.3 B1=1000000, sigma=3733942265 for P31 / Nov 21, 2012)
(53*10^251+1)/9 = 7 * 47 * 223 * 4149122683<10> * 34979485391<11> * 415700853055175353959977<24> * 26845887669394161079675077774701<32> * 49850161892219261129620074499751170709<38> * 4696082526223998988693596455021504072266239513164531199323400460531<67> * 21169077312006256612747471007564802726174895890716551205653664100233<68> (Jason Parker-Burlingham / GMP-ECM for P32 / Jan 2, 2021) (Ignacio Santos / GMP-ECM B1=3000000, sigma=1:1754173392 for P38 / Mar 2, 2021) (Eric Jeancolas / cado-nfs-3.0.0 for P67 x P68 / Mar 3, 2021)
(53*10^252+1)/9 = 3 * 24551 * 13142856407<11> * 66076426184723<14> * 56206113725487690656125100053105531<35> * 1638034530624081226868656448926115639888436533091408657308277441567211705180734387183909879600530925844917250543060896451330915624467318804495335282503769578661113544264681566653346095563443<190> (Jason Parker-Burlingham / GMP-ECM for P35 x P190 / Jan 2, 2021)
(53*10^253+1)/9 = 5119 * 9817 * 48518232874379462928702488872213<32> * 24152632035922878500702324287181546184158289591853073150015656312834053084452650915691083315218227340969571653024036654133807663339697093045590886720808083898631185590127069977524406823786599923909790960186108928611<215> (Jason Parker-Burlingham / GMP-ECM for P32 x P215 / Jan 2, 2021)
(53*10^254+1)/9 = 17 * 19 * 23^2 * 517782943 * 2056258837<10> * [3237051764921822830554613982596230943851212664689776409045845109552634931009592985501028384476681977837522391411425691048910717438036292924602132342303770347966491387174226485480087131737410956593219994380262460603369997666037729737<232>]
(53*10^255+1)/9 = 3 * 13 * 17107 * 7540448277623<13> * 1170570924067698258018973008987428043746423269627582729626564957918190824693908281026012104983164866960837357978585960617191282826052061389114015735547736638081308947596446390109196516657951037493275880381481429136644093211675957771941091<238>
(53*10^256+1)/9 = 415979 * [141566975469648441120558703417453498587401981563706073837594899956221080604763434906302695301659191663254368342846366977392822447500688469583533997843374037845393370552092506806566891330785661989881433651431656138624519239886842578324600253591861341291<252>]
(53*10^257+1)/9 = 7 * 31 * 349 * 242551 * 1955203 * 2836356869<10> * 66971253687364919<17> * 86318517603499762839567167773617734441580133604352166315535923790725212035266155535795698705485172599759175540756791697704378140830794111723596251353243582226140991090773666474433755492814237202415498756071009406251<215>
(53*10^258+1)/9 = 3^2 * 24251 * 11334727 * 337768891 * 10417019747715127832083949<26> * [676529905812707774075775758260583627635809534374977733717801363915136985658592757189945864274820894059574197948440207343157025948388651488286401185352318954877492910478892314793880871125791730558738228321276410747<213>]
(53*10^259+1)/9 = 281 * 345945353305905307508552159688978917<36> * [605786427254808391327064650454118756526355247992536869952237699969878066739784481881654325608704361321333026839518610635731760117014915498376640230102770702305456544426482296547681681433672693651286557614513370661350658957<222>] (Eric Jeancolas / GMP-ECM 7.0.4 B1=1000000, sigma=1:320464187 for P36 / May 23, 2021)
(53*10^260+1)/9 = 83 * 1451 * 8761 * 17911 * 65777 * 4207369024889<13> * 650129189957393<15> * 115196626724334307<18> * [1503454350585992294887914758394329646599275412423572225703273983363065307684653552675402945118305897430746597284889703708513482555846813154683497496084105701861300137578879080995881089155693046463941<199>]
(53*10^261+1)/9 = 3 * 13^2 * 4626306193<10> * 33865540576501<14> * 44694737643496925314621097<26> * [1658733526874125856200419902552785329387300979772966520877737444703796191154562226502743718135201435511056861618354281528932325931653500371471363302796149655251206223475455860084787546180805890260396661063956487<211>]
(53*10^262+1)/9 = 29 * 2437 * 125219 * 574547 * 131018288044460792237<21> * 124340617040786419450601872631<30> * [710950071028204768113344691356019043279894571265736559317922841322517532383772527797559236402133384274035533572428426543283974455534212611697742266952945775509610690659143872717093104552984531551283<198>] (Jason Parker-Burlingham / GMP-ECM for P30 / Jan 2, 2021)
(53*10^263+1)/9 = 7 * 7547 * 1349839917468971<16> * [8258072725350613632840701337027361606617437568839084100216227911133542035913217273988708462819899013331137787149211392022085240269461534310897441760691217547979690705028539715941583520844280108583347003732383185850985185248260553570730185439271<244>]
(53*10^264+1)/9 = 3 * 44075295082972913<17> * [44536581304053281483523218416713490579994910145076187080602389931874917128823063740150056916420813144681857773612604640187447921773264202942694008654609549346017939893688959761351107363521373350668320615833470987529543528333731240070321612486678851<248>]
(53*10^265+1)/9 = 36651401 * 3302128561690990670182616742883<31> * [486573891954812837762227855484263633114278022299150255483960729850365055694523120897540295870328819618169066511664788233441041093999003573102797621683537724300189954124633136350749868715438872454207700051400162414485012953125083<228>] (Jason Parker-Burlingham / GMP-ECM for P31 / Jan 2, 2021)
(53*10^266+1)/9 = 5449 * 5737 * 6997 * 11329 * 124483378807823054942783874778717<33> * 63474944698037440984716469906053292926531674227<47> * 30075617495432058188326318723589420858916603700285473074308665892026793071945325390493716586997903880372495483702639803091405817753694142248550436990155866322350810574566259<173> (Jason Parker-Burlingham / GMP-ECM for P33 / Jan 2, 2021) (Seth Troisi / GMP-ECM 7.0.6, ecm-db 0.1 B1=10000000000 for P47 x P173 / Jan 2, 2024)
(53*10^267+1)/9 = 3^2 * 13 * 2212127 * 738138773989697189178742228763<30> * 30824740043257309980242365886100017476300415705161520039968808172071796966555657915762855565785369146910833383906085273035634029100773332807613381216229877175710350165652039852822433444511179546205336315051847831482596249173754417<230> (Jason Parker-Burlingham / GMP-ECM for P30 x P230 / Jan 2, 2021)
(53*10^268+1)/9 = 71 * 2011 * [412442053836917299142665262807298512329293735783394771635503945825347132243708118649462385673786350346957150383376561929730768721951022117010588866087847044697045747605696058221254150684537080486121324888387732883849313906534405060119265790888765934465292222977069<264>]
(53*10^269+1)/9 = 7^2 * 278743 * [43115488423275780908336447207122242651642236820801202430773141325257688461684359595441026826107092056115247472775477322420461543493973264150708709213958032506198481923176611217464005054827322753589704047396514753798806031251586578792745661253826225041389445261727<263>]
(53*10^270+1)/9 = 3 * 17 * 229 * 354043 * [1424202322376683217138321008709262344811057320599012285490968187416903264568287492838042907245028417259823212906365075338552294098405789859059173510310778326579121401892871239418829022686956734666841156603108258371624436300959290018425922002584424552309106864837<262>]
(53*10^271+1)/9 = 200467 * 793143740105009687<18> * 123740417855490802977133<24> * [2993139717328110480507259155002981598503414024467564534418912452511569074298453049802181801851960737457334792731179161002438629220292627912010249770765982869641242379831367925817670012824008413583669035250333107642260603134377<226>]
(53*10^272+1)/9 = 19 * 31 * 461 * 38103914042447842751801804107287729073<38> * 56917727381704430669006575186980735180130497548252749446512056916288993327895556806081523913203744304525811432916613001343150908089886093795714856375899492581179692961225094138635143618257507040073735195723484461452322267132453217<230> (Jason Parker-Burlingham / GMP-ECM for P38 x P230 / Jan 2, 2021)
(53*10^273+1)/9 = 3 * 13 * 2125463 * 790798848301961<15> * 100814858233034342462442139751<30> * [891096282884795913951543012753747772474141186545693554058749650782462284732871314054790752919882379470682734684929108776909775872949057517754045019229171530586412926596655163570979865885739192316611481079704318021147677607<222>] (Jason Parker-Burlingham / GMP-ECM for P30 / Jan 2, 2021)
(53*10^274+1)/9 = 4657 * 12645241333237897549686254861260229523059671223725335814663708157373607234032400448548183141268818743587908286211915157588337747238327010712666714384558490205902703218571803497721470665426001479254646529716317133109059241762698923961539379190227375754539164459714169827977<272>
(53*10^275+1)/9 = 7 * [84126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984126984127<275>]
(53*10^276+1)/9 = 3^5 * 23 * 57877087508372338869394128498945619<35> * [18205079597313501791138758981998579477239027106959543886331008368772721010634512407849754657642474140054683265860663752690602223023363291069702011787188974450816538548913198650799186866760055952766605440014094792848813875523812118342548279<239>] (Jason Parker-Burlingham / GMP-ECM for P35 / Jan 2, 2021)
(53*10^277+1)/9 = 7673 * 97381 * 13001239 * 1627579660174097387237<22> * 226656528137199658686875875831<30> * [16432313204919272561743688169020293351539424978564850588827389443656647040396921954689197210256547600000004630219421038202793960571932567686437862757570029550303437278166869549451320979195349093520742562982110841<212>] (Jason Parker-Burlingham / GMP-ECM for P30 / Jan 2, 2021)
(53*10^278+1)/9 = 9283 * 826667 * 730518766146049<15> * 105046849432624520900940330338285387651517266557914988114750099067341320082342159725351091763190028546015027750537071795377793920565869923024626612834662335797185786093044840094142658111934547574344848353003350963905458304974160540387353161993262774161401<255>
(53*10^279+1)/9 = 3 * 13 * 61 * 67 * 480749 * 76850328081055485430455510111558685990699068522375742117857650028350695829204660799528958020998856167731025783437752495925756247057051368471542237249991895140737117048830869677983589083089999856133039318831378625066830571974553366003800009533487069325276295973506445277<269>
(53*10^280+1)/9 = 1803742783793<13> * 56771135713399<14> * 698002974190057<15> * [823898852431931036039849810890550381188470916805312239855516152657609520405844835163939536581983210051744422771005311974942482479504632911220769078239330453792169889647283155797754312140421632225169867462655144047376564807828312419921190311<240>]
(53*10^281+1)/9 = 7 * 89 * 109 * 4013 * 20027366209<11> * 954851026197487<15> * [113003058342810431614799828613416949171847299324704010217049997048525148666082828545067574525682038682414101958799140944289858765026438847234226162252096256685006898628013351160447575906573198838785677292522497220250688304952040041493406783692728113<249>]
(53*10^282+1)/9 = 3 * [1962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962962963<283>]
(53*10^283+1)/9 = 1511 * 825005483485254544397<21> * 47240236229451243739648512643192279775687750124297080611264497779352132153898683159439367844831874325308067583226422906177711690083533663626404337569630251042803978025854561865656125652896373364978207152118374427265488280149540933984918120962365981477452269467<260>
(53*10^284+1)/9 = 317 * 369780429911<12> * 110996031940637<15> * 45260851660017886750560449785924933008835834788632955605361002717422428398096463603012921565041715354799597611772755439454020320676586260520529205925078745984018680860061861188195062739959317992359079355555262752295349754988297790637363353080680372931819031<257>
(53*10^285+1)/9 = 3^2 * 13 * 122775081061<12> * 2536705975775404515103890721<28> * 161609593132402224112140925584351145199454202918773368579337932256782723303290914988255257902116869882645516405874936969543000449020597048346794624238615648212627832400164505058656256768433462424851983741335422425637084624655874367328614495327857<246>
(53*10^286+1)/9 = 17 * 24917 * 2648959 * 7080117722303<13> * 128973706658887847<18> * 57474048460363349902603396421253656361547287747434648953256946504156119778179134774273195305774012192206327991413962925555630352485699295204967202694741831464872459813963187662903511363626449573419929266468516783185857057104148142099933479440179<245>
(53*10^287+1)/9 = 7 * 31 * 281 * 31481 * 25477391 * 231066030996557<15> * 350308443838487<15> * [148756901789850693995901214588503488524066214954573917775148256128663699087349601563481573904440859183275075012170623239671428421345295966090786412168893301943233959357359760604833370316709418086988582874225443429698065169162795311366946952413<243>]
(53*10^288+1)/9 = 3 * 9433 * 3755879434380564061<19> * 119170214227771374803<21> * [464925009049186467875590449337675039242048588369941146389835223954004176878134463263976434580796107737043121334522158473698411807170554687101642993713090765462761024031220243701999340348171596108656462433499536334613531083808863482574437025881917<246>]
(53*10^289+1)/9 = 343307 * 2558333666369098763<19> * 6378512289787336867588722331<28> * 10511728101560519796574560081924736207388840680403123537140042599247502119864492069314581668273273447274192017631772913215689306434281559812050564276809920570516213722672704681480724443006627329213155550111134497929486865587439167393365459<239>
(53*10^290+1)/9 = 19 * 29 * 25855805833122110654726541053<29> * 41335546475719331338014957135386458933400710671666476685654824136306350527586956445432601420715411083998933080173642024435149311134839129861660915689353753749720061816088958282883372558146686547870392649085469645581409187223581250033647092889966263267017858763<260>
(53*10^291+1)/9 = 3 * 13 * 59 * 279221053 * [9165762102166499889696266708906358568218389441608534084513886893325108780146872025608423840289306247999677532389325241717041358334093022751865222967761505054150402743907648692089395371324037233415115874624532405203382116928041600302819900464796058670243255785684148809093973318513<280>]
(53*10^292+1)/9 = 210323 * 385739 * [725860296988151218007664212999890957775209275730073426980911686688394609253149934339691068249550406401952974861619750792873716749074853494723583854113734564920701157787642325025104385480620997210063458859179471292814839623038874288999312489919615382367249366104135650335787790839337<282>]
(53*10^293+1)/9 = 7 * 4460161 * 77525051459<11> * 139046162287<12> * 67839875970231142562227<23> * [25792810603724296422059006924108754636663296918780447121990797038795092423253286092119353621576324011768227692511070935713211684393860276438032738955807692647874214129804739629665526786645919073875533615932894415168785813877956390346489853977<242>]
(53*10^294+1)/9 = 3^2 * 191 * 268607 * 329317 * [38728083560668797248064427396498929228188611739552934181384020647899193294954884671295573889685616550913411719259677541130339883752419761061920206355993132585778122932942826170422331551834101202657433141053223819715870499678685804977532011739384305495042364177391664469775266349149<281>]
(53*10^295+1)/9 = 479 * 1583 * 5923323656493133075741<22> * 175479640075457678178972877022933814380651<42> * [74717913093429802642638022778834446354875850733237602664989588346409949711825791995291906087771741059652871588389534993066679088912899537973498010503588515778127423668263591037382119919185511351002462023031710027151838756321047<227>] (Eric Jeancolas / GMP-ECM 7.0.4 B1=1000000, sigma=1:3296995587 for P42 / May 23, 2021)
(53*10^296+1)/9 = 739 * 32889487 * 609856603 * 118753656230997587<18> * 11486882823130243780513<23> * 595450946170125877114253<24> * [48911267972109235309751889864016916605340685749789643131748107132106626436959876540666753814408866744499552047182121289597628340178828671176815207604721792768646538471472332149677485951771490275154781662771907343537<215>]
(53*10^297+1)/9 = 3 * 13 * 47 * 36571 * 64217 * 566201597018712770009<21> * 11640970205548067473091253731440254397<38> * [207550497490103290316935122224292436630064452354834000287380609678076971020277250284017954746785321285870320333496787978227323549007038945726641996322506162520295489433320301471912273128753520796734813230906814714273904162518703<228>] (Eric Jeancolas / GMP-ECM 7.0.4 B1=1000000, sigma=1:986772964 for P38 / May 23, 2021)
(53*10^298+1)/9 = 23 * 51197 * 2774353 * 2492960222239<13> * 18170763475181755000397<23> * 372934301964355627207306789979<30> * 794526940050158287364038877130737<33> * 183168187264628419442524401781592645463452389469<48> * 7331954517968522169505853186450336100108068593601652483524007970963048479062356362609394131238570191552990056832503967133180072751510355325463<142> (Jason Parker-Burlingham / GMP-ECM for P30 x P33 / Jan 2, 2021) (Ignacio Santos / GMP-ECM B1=11000000, sigma=1:276505730 for P48 x P142 / Apr 3, 2021)
(53*10^299+1)/9 = 7 * 2333 * 145601 * 227207 * 9918427361<10> * 22473508763<11> * 572587679764578435591919<24> * 226551604507667921259609080147<30> * 37697423975526923725298432199261133208202262547760633051731259437807868819942664691182703327902021743384371048977194045027126973178030605290463773551993613076198977486141601282652419646679522340942672900956550483<212> (Jason Parker-Burlingham / GMP-ECM for P30 x P212 / Jan 2, 2021)
(53*10^300+1)/9 = 3 * 16860456895027<14> * 79684398687264389094413238783481626040801343<44> * 1461064761786459532337690295735488191561383203776355287641567323682964093953928625037622505700750712383776641918121248224843651352907395227986583575193688637330485011312667918640924599652380308591434062939041691194654954082385585780957498820383<244> (Dmitry Domanov / GMP-ECM B1=43000000, sigma=1:2386466431 for P44 x P244 / May 3, 2021)