| 5195419 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 89 / 280 |
Estimated T-Level: 21.6 ⓘ TF below 2^67 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Ken Kriesel | 50A63F951D98687F | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Bad | 2000-07-03 | MAREK PRZEPIORKOWSKI | 513BF04D7B8E11D3 | 3082916 | Windows,Prime95,v18,(aka WU1) | | Factored | 2001-10-06 | Stephen Wood | 50A63F951D98687F | 813277 | Linux 32-bit,Prime95,v21,(aka WX2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-31 | Torchwood Institute | 78E599A6C14BFE9E | 1 | 1907546 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-31 | Marius | CERT | Proof certified good | | 2025-01-31 | Torchwood Institute | C-PRP | M5195419/125995970956359816540890017 : 78E599A6C14BFE9E Proof Certified Good
Proof Power: 7
| | 2025-01-26 | fordobr | F-ECM | Factor: 125995970956359816540890017 / ECM curve 42, B1=50000, B2=60054225, Edwards Sigma=41383365441517 | | 2024-09-30 | Andrew B | NF | no factor TF: 71-72 | | 2022-08-02 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-02 | mikr | NF | no factor TF: 70-71 | | 2022-01-05 | TJAOI | NF | no factor TF: 69-70 | | 2020-10-05 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-20 | ramgeis | NF | no factor TF: 67-68 | | 2018-02-18 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9222500, E=12 | | 2016-06-10 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-10 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-10-12 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-20 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2001-10-06 | Stephen Wood | C-LL | 50A63F951D98687F | | 2001-08-04 | Stephen Wood | NF-PM1 | B1=15000, B2=15000 | | 2000-07-03 | -anonymous- | C-LL | 513BF04D7B8E11D3 | | 1998-12-21 | -anonymous- | C-LL | B4816C8FE72C9A__ | | 1998-05-23 | MadPoo 🙂 | NF | no factor TF: 1-62 |
|
