View Single Post 2022-06-06, 21:40 #34 kriesel   "TF79LL86GIMPS96gpu17" Mar 2017 US midwest 23·853 Posts Selecting M199 for a test run that would require stage 2 in P-1; 10 separate 1-curve B1=50000, B2=4000000 runs, succeeded in 7 of 10: Code: ECM found a factor in curve #1, stage #1 Sigma=5162481759413312, M199 has a factor: 164504919713 Cofactor is a probable prime! ECM found a factor in curve #1, stage #1 Sigma=5912327664438779, M199 has a factor: 164504919713 Cofactor is a probable prime! M199 completed 1 ECM curve ECM found a factor in curve #1, stage #2 Sigma=7974985130155996, M199 has a factor: 164504919713 ECM found a factor in curve #1, stage #2 Sigma=8865572054271244, M199 has a factor: 164504919713 ECM found a factor in curve #1, stage #1 Sigma=608224716041860, M199 has a factor: 164504919713 Cofactor is a probable prime! ECM found a factor in curve #1, stage #2 Sigma=1498813620767224, M199 has a factor: 164504919713 M199 completed 1 ECM curve M199 completed 1 ECM curve ECM found a factor in curve #1, stage #2 Sigma=4311317535291977, M199 has a factor: 164504919713 (This factor is only 37 bits so would have been found in the recommended 40-44 bits TF.) Or M257, B1=120000, B2=4000000, 10 separate curves run individually, of which two found the 49 bit factor that would not be found by recommended level TF (to 40-44 bits): Code: ECM found a factor in curve #1, stage #2 Sigma=5976369241598935, M257 has a factor: 535006138814359 M257 completed 1 ECM curve ECM found a factor in curve #1, stage #2 Sigma=8788874036099382, M257 has a factor: 535006138814359 M257 completed 1 ECM curve M257 completed 1 ECM curve M257 completed 1 ECM curve M257 completed 1 ECM curve M257 completed 1 ECM curve M257 completed 1 ECM curve M257 completed 1 ECM curve Last fiddled with by kriesel on 2022-06-06 at 21:41  