GMP-ECM 7.0.5 [configured with GMP 6.2.1, --enable-asm-redc] [ECM]
Input number is (10^252+7)/23/4614820753/47375924795691641 (225 digits)
Using B1=43000000, B2=240490660426, polynomial Dickson(12), sigma=1:1026627355
Step 1 took 158282ms
Step 2 took 50566ms
********** Factor found in step 2: 2503563389547969670621048510546722341757466233535591
Found prime factor of 52 digits: 2503563389547969670621048510546722341757466233535591
Composite cofactor ((10^252+7)/23/4614820753/47375924795691641)/2503563389547969670621048510546722341757466233535591 has 173 digits