| 5265241 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 68 / 280 |
Estimated T-Level: 21.2 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-08-09 | Sean Applegate | E4F3C578D22E1C78 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-07-25 | Chris Snyder | E4F3C578D22E1C78 | 3794907 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-18 | Vinickw | 9BBF08F7F4CC674D | 1 | 4599369 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-18 | Jason Lynch | CERT | Proof certified good | | 2025-02-18 | Vinickw | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-02-12 | Andrey Dobrynin | F-ECM | Factor: 1955545454620442346004193 / ECM curve 31, B1=50000, B2=60054225, Edwards Sigma=1771487189344253 | | 2021-10-03 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-19 | 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 | | 2020-11-29 | Carlos Pinho | NF-PM1 | B1=228000, B2=7366000 | | 2020-11-23 | TJAOI | NF | no factor TF: 68-69 | | 2019-06-23 | Numberwang | NF-PM1 | B1=125000, B2=2187500, E=12 | | 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 | | 2009-08-23 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2009-06-07 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-07-25 | Chris Snyder | C-LL | E4F3C578D22E1C78 | | 1998-11-07 | -anonymous- | C-LL | E4F3C578D22E1C78 | | 1998-09-06 | -anonymous- | C-LL | E4F3C578D22E1C78 | | 1998-08-09 | -anonymous- | C-LL | E4F3C578D22E1C78 | | 1998-05-08 | pheede | NF | no factor TF: 1-62 | | 1998-02-24 | -anonymous- | NF | no factor TF: 1-61 |
|
