GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM]
Input number is Phi(8402,10)/75619/193247/529327/201368255411 (4173 digits)
Using B1=2025000, B2=2938615696, polynomial Dickson(6), sigma=1:4103960558
Step 1 took 1844119ms
Step 2 took 280115ms
********** Factor found in step 2: 47962315664132037883886339559337823
Found prime factor of 35 digits: 47962315664132037883886339559337823
Composite cofactor (Phi(8402,10)/75619/193247/529327/201368255411)/47962315664132037883886339559337823 has 4139 digits