| 5265787 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 56 / 280 |
Estimated T-Level: 21.0 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-21 | Charley Kline | 5D89A901FE553933 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-09-15 | Tomasz Jakutowicz | 5D89A901FE553933 | 1734765 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-18 | Stefan G Hoffmann | A844934612082657 | 1 | 3087980 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-18 | Pappy | CERT | Proof certified good | | 2025-02-18 | Stefan G Hoffmann | C-PRP | M5265787/431279636478515036751888737 : A844934612082657 Proof Certified Good
Proof Power: 7
| | 2025-02-13 | fordobr | F-ECM | Factor: 431279636478515036751888737 / ECM curve 23, B1=50000, B2=88280115, Edwards Sigma=971851313728388 | | 2022-09-07 | Sid & Andy | NF-PM1 | B1=8000000, B2=6410980290 | | 2021-09-17 | SRBase | NF | no factor TF: 71-72 | | 2021-09-06 | SRBase | NF | no factor TF: 70-71 | | 2021-08-22 | SRBase | NF | no factor TF: 69-70 | | 2020-11-23 | TJAOI | NF | no factor TF: 68-69 | | 2020-05-21 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2019-06-23 | Numberwang | NF-PM1 | B1=100000, B2=1575000 | | 2019-06-22 | Numberwang | NF-PM1 | B1=100000, B2=1575000 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-05 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-13 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-07-15 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-08-24 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2009-06-07 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-09-15 | -anonymous- | C-LL | 5D89A901FE553933 | | 1998-07-21 | -anonymous- | C-LL | 5D89A901FE553933 | | 1998-07-21 | -anonymous- | NF | no factor TF: 1-61 | | 1998-06-14 | -anonymous- | NF | no factor TF: 1-62 | | 1998-06-01 | -anonymous- | NF | no factor TF: 1-61 |
|
