GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM]
Input number is Phi(19958,10)/38093288157464209 (9360 digits)
Using B1=4000, B2=376750, polynomial x^1, sigma=1:454426969
Step 1 took 11498ms
********** Factor found in step 1: 42861281544112103
Found prime factor of 17 digits: 42861281544112103
Composite cofactor (Phi(19958,10)/38093288157464209)/42861281544112103 has 9343 digits
# known as factor to factordb.com before March 17, 2011