| 5306761 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 270 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 6 / 280 |
Estimated T-Level: 20.1 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-11-07 | David Cato | 66AA971F4DEA32F4 | 0 | Linux 32-bit,Prime95,v17,(aka WT2) | | Factored | 2000-06-11 | Bryon Buck | 66AA971F4DEA32F4 | 2643252 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-11-25 | storm5510 | A7C8835579A77984 | 1 | 2325062 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-02-03 | kkmrkkblmbrbk | A7C8835579A77984 | 1 | 3248750 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-04-05 | Sid & Andy | NF | no factor TF: 68-70 | | 2025-03-29 | Sid & Andy | NF-PM1 | B1=5700000, B2=7179714360 | | 2018-02-03 | kkmrkkblmbrbk | C-PRP | M5306761/10086880882130428319 : A7C8835579A77984 | | 2017-11-25 | storm5510 | C-PRP | M5306761/10086880882130428319 : A7C8835579A77984 | | 2014-12-23 | VictordeHollander | F | Factor: 10086880882130428319 / TF: 63-64 | | 2010-04-13 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=990000, E=6 | | 2009-05-30 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-06-11 | -anonymous- | C-LL | 66AA971F4DEA32F4 | | 2000-05-24 | -anonymous- | NF-PM1 | B1=20000, B2=135000 | | 1998-11-07 | David Cato | C-LL | 66AA971F4DEA32F4 | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-62 |
|
