| 5247961 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 90 / 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 | | Stephen Wood | 198B566651EE538D | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 2000-06-23 | J. Miguel Pinilla | 198B566651EE538D | 5096633 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-17 | jeriffee | 1434D1A5F98C0F10 | 1 | 2368559 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-17 | Samarth Hiremath | CERT | Proof certified good | | 2025-02-17 | jeriffee | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-02-11 | Andrey Dobrynin | F-ECM | Factor: 7714204755683026920323567 / ECM curve 39, B1=50000, B2=88280115, Edwards Sigma=7058110395882042 | | 2025-02-09 | Jason Lynch | NF-PM1 | B1=13858000, B2=243457234020 | | 2021-09-18 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-09-06 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-09-21 | TJAOI | NF | no factor TF: 68-69 | | 2019-03-26 | USAFSS | NF-PM1 | B1=315000, B2=9213750 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-03 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-12 | 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 | | 2010-06-25 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-08-21 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2009-06-09 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2002-10-19 | David Campeau | NF | no factor TF: 1-62 | | 2000-06-23 | -anonymous- | C-LL | 198B566651EE538D |
|
