Resuming ECM residue saved by Agando@AR-32GB with GMP-ECM 7.0.4-dev on Fri Feb 24 21:48:32 2017
Input number is (8757^41-1)/8756 (158 digits)
Using B1=3000000-3000000, B2=5706890290, polynomial Dickson(6), sigma=3:1219826293
Step 1 took 0ms
Step 2 took 4953ms
********** Factor found in step 2: 412714277368112908533949685192576868233
Found probable prime factor of 39 digits: 412714277368112908533949685192576868233
Probable prime cofactor ((8757^41-1)/8756)/412714277368112908533949685192576868233 has 120 digits