GMP-ECM 7.0.4-dev [configured with MPIR 2.7.2, --enable-openmp] [ECM]
Input number is Phi(20874,10)/3772182289 (5871 digits)
Using B1=20000, B2=3726670, polynomial x^1, sigma=0:16613001515040554655
Step 1 took 60029ms
Step 2 took 12231ms
********** Factor found in step 2: 714023669691642157
Found probable prime factor of 18 digits: 714023669691642157
Composite cofactor (Phi(20874,10)/3772182289)/714023669691642157 has 5853 digits
# known to factordb.com before March 17, 2011