n=1626: c478(7056846767......) = 2361737551129877719236265175893 * c448(2987989399......)
# GMP-ECM
n=886: c436(3854476104......) = 3646836465960880692292201915543408162476049 * c394(1056936920......)
n=1734: c463(7868070896......) = 1363267285346876343226104657933729291571 * c424(5771480751......)
n=1794: c462(4482689184......) = 8506605834248913330852032305919581849 * c425(5269656631......)
# GMP-ECM
# via ECMNET
n=311: c311(1111111111......) = 4344673058714954477761314793437392900672885445361103905548950933 * p247(2557410180......)
# GMP-ECM
n=872: c410(2535373267......) = 1710994186565875947530228779349674860535337 * c368(1481812905......)
# GMP-ECM