GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM]
Input number is Phi(20316,10)/291316978911881929 (6751 digits)
Using B1=50000, B2=15446350, polynomial x^2, sigma=1:2434483371
Step 1 took 90855ms
Step 2 took 21450ms
********** Factor found in step 2: 1786838360858671069
Found prime factor of 19 digits: 1786838360858671069
Composite cofactor (Phi(20316,10)/291316978911881929)/1786838360858671069 has 6733 digits