GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM]
Input number is Phi(21710,10)/6399736845841 (7956 digits)
Using B1=3000, B2=257260, polynomial x^1, sigma=1:3820400986
Step 1 took 6895ms
Step 2 took 2433ms
********** Factor found in step 2: 1284450265477803971
Found prime factor of 19 digits: 1284450265477803971
Composite cofactor (Phi(21710,10)/6399736845841)/1284450265477803971 has 7938 digits