GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM] Input number is Phi(17186,10)/4990505053/195980551001 (7900 digits) Using B1=50000, B2=15446350, polynomial x^2, sigma=1:3627592131 Step 1 took 108701ms Step 2 took 24055ms ********** Factor found in step 2: 24415412859491394447331 Found prime factor of 23 digits: 24415412859491394447331 Composite cofactor (Phi(17186,10)/4990505053/195980551001)/24415412859491394447331 has 7877 digits GMP-ECM 7.0.4-dev [configured with GMP 6.1.1, --enable-asm-redc] [ECM] Input number is Phi(17186,10)/4990505053/195980551001/24415412859491394447331 (7877 digits) Using B1=250000, B2=183032866, polynomial Dickson(3), sigma=1:1624146151 Step 1 took 563272ms Step 2 took 110387ms ********** Factor found in step 2: 288415103445712439279085419 Found prime factor of 27 digits: 288415103445712439279085419 Composite cofactor (Phi(17186,10)/4990505053/195980551001/24415412859491394447331)/288415103445712439279085419 has 7851 digits