| 5270081 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 57 / 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 | 1999-02-14 | Ernst W. Mayer | 8B19A774F6042A0B | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2001-12-01 | Mistel | 8B19A774F6042A0B | 3775623 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-18 | ATH | E6B6F934D775FFBD | 1 | 5096443 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-18 | ky0uraku | CERT | Proof certified good | | 2025-02-18 | ATH | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-02-13 | Andrey Dobrynin | F-ECM | Factor: 2745148234095790002707878654529 / ECM curve 25, B1=50000, B2=64857975, Edwards Sigma=7658502590671069 | | 2021-09-28 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-19 | SRBase | NF | no factor TF: 71-72 | | 2021-08-31 | SRBase | NF | no factor TF: 70-71 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-11-09 | TJAOI | NF | no factor TF: 68-69 | | 2019-06-25 | USAFSS | NF-PM1 | B1=315000, B2=9292500 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-07 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-14 | 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 | | 2009-11-01 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-07 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2008-02-03 | -anonymous- | C-LL | 8B19A774F6042A0B | | 2008-02-03 | -anonymous- | NF-PM1 | B1=20000, B2=195000 | | 2001-12-01 | -anonymous- | C-LL | 8B19A774F6042A0B | | 2000-05-31 | -anonymous- | C-LL | 8B19A774F6042A0B | | 2000-05-10 | -anonymous- | NF-PM1 | B1=20000, B2=195000 | | 1999-02-14 | Ernst W. Mayer | C-LL | 8B19A774F6042A0B | | 1998-05-23 | MadPoo 🙂 | NF | no factor TF: 1-62 | | 1998-03-03 | -anonymous- | NF | no factor TF: 1-61 |
|
