| 5206963 | 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 | 1999-09-30 | Gordon Cross | F8DB4CCFF4DF314B | 4226873 | Windows,Prime95,v18,(aka WU1) | | Factored | 2001-02-04 | Bradley A. Ellison | F8DB4CCFF4DF314B | 4403041 | 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) | 2017-11-22 | storm5510 | D1B552142B1FA609 | 1 | 2888326 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-01-23 | kkmrkkblmbrbk | D1B552142B1FA609 | 1 | 2762221 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-07 | Sid & Andy | NF | no factor TF: 68-70 | | 2023-04-18 | Kevin_9611 | NF-PM1 | B1=270000, B2=149890020 | | 2018-01-23 | kkmrkkblmbrbk | C-PRP | M5206963/85927976188933647169 : D1B552142B1FA609 | | 2017-11-22 | storm5510 | C-PRP | M5206963/85927976188933647169 : D1B552142B1FA609 | | 2016-05-28 | Gordon Spence | F | Factor: 85927976188933647169 / TF: 66-67 | | 2015-08-10 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-06-06 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-18 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2001-02-04 | -anonymous- | C-LL | F8DB4CCFF4DF314B | | 2001-01-08 | -anonymous- | NF-PM1 | B1=25000, B2=275000 | | 1999-09-30 | -anonymous- | C-LL | F8DB4CCFF4DF314B | | 1999-04-13 | -anonymous- | C-LL | 52C7584AED82BD__ | | 1999-03-01 | -anonymous- | NF | no factor TF: 1-62 |
|
