| 5156267 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 104 / 280 |
Estimated T-Level: 21.9 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-02-19 | Anthony Staines | 94C58CCE745A49F6 | 0 | Windows,Prime95,v14,NT service,(aka WQ5) | | Factored | 2000-05-17 | Richard Otter | 94C58CCE745A49F6 | 4440007 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-16 | Torchwood Institute | 846740FFE9F6591D | 1 | 3248368 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-17 | kakama51 | CERT | Proof certified good | | 2025-01-16 | Torchwood Institute | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-01-10 | Andrey Dobrynin | F-ECM | Factor: 7182683103214647368895271 / ECM curve 49, B1=50000, B2=64857975, Edwards Sigma=2366055946843258 | | 2024-10-19 | Andrew B | NF | no factor TF: 71-72 | | 2022-06-29 | Sid & Andy | NF-PM1 | B1=4000000, B2=9110873310 | | 2022-01-23 | mikr | NF | no factor TF: 70-71 | | 2021-12-02 | TJAOI | NF | no factor TF: 69-70 | | 2020-11-30 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-20 | ramgeis | NF | no factor TF: 67-68 | | 2017-02-21 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9687500, E=12 | | 2016-06-01 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-07 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-17 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-17 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-09-28 | USAFSS | NF-PM1 | B1=55000, B2=935000, E=6 | | 2009-06-24 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2008-10-10 | Sturle Sunde | NF | no factor TF: 61-62 | | 2000-05-17 | Richard_Otter | C-LL | 94C58CCE745A49F6 | | 1998-02-19 | -anonymous- | C-LL | 94C58CCE745A49F6 | | 1998-02-19 | -anonymous- | NF | no factor TF: 1-61 |
|
