GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM]
Resuming ECM residue saved by Alfred@ALFRED-THINK with GMP-ECM 7.0.4-dev on Thu Feb 15 04:43:29 2018
Input number is Phi(16444,10)/16923589261 (8210 digits)
Using B1=250000-250000, B2=183032866, polynomial Dickson(3), sigma=0:12714713872335694143
Step 1 took 16ms
Step 2 took 118982ms
********** Factor found in step 2: 507129613949013184875341
Found prime factor of 24 digits: 507129613949013184875341
Composite cofactor (Phi(16444,10)/16923589261)/507129613949013184875341 has 8187 digits