| 5471413 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 71 / 280 |
Estimated T-Level: 21.3 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-09-20 | BitBucket | 613DE5CB33A1E891 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-08-24 | Dennis Burke | 613DE5CB33A1E891 | 401385 | Windows,Prime95,v18,NT service,(aka WU5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-29 | Daniil Tsarkov | A3D8BBEF3E43AEFC | 1 | 76248 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-29 | George Woltman | CERT | Proof certified good | | 2025-03-29 | Daniil Tsarkov | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-19 | Andrey Dobrynin | F-ECM | Factor: 457287909612027977145713 / ECM curve 35, B1=50000, B2=45039225, Edwards Sigma=393578967775199 | | 2021-11-05 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-10-11 | SRBase | NF | no factor TF: 71-72 | | 2021-08-24 | SRBase | NF | no factor TF: 70-71 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-09-07 | TJAOI | NF | no factor TF: 68-69 | | 2019-09-19 | USAFSS | NF-PM1 | B1=330000, B2=9817500 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-04 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-24 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-30 | monst | NF | no factor TF: 64-65 | | 2014-12-30 | snme2pm1 | NF | no factor TF: 63-64 | | 2010-11-09 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2009-08-20 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2009-05-05 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2008-09-13 | -anonymous- | NF-PM1 | B1=10000, B2=250000 | | 2000-08-24 | -anonymous- | C-LL | 613DE5CB33A1E891 | | 1999-01-29 | -anonymous- | C-LL | 613DE5CB33A1E891 | | 1998-09-20 | -anonymous- | C-LL | 613DE5CB33A1E891 | | 1998-04-27 | -anonymous- | NF | no factor TF: 1-62 |
|
