| 2491117 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 129 / 280 |
Estimated T-Level: 22.3 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Marco Mantovanelli | 8BDD531532F607E3 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | | David Cuciz | 8BDD531532F607E3 | 0 | Windows 16-bit,Prime95,v13,PFA,(aka WP0) | | Factored | | Klaus Kastens | 8BDD531532F607E3 | 0 | Mlucas,Ernst Mayer,v2.5 and later,(aka E2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-14 | Oliver Kruse | 5317F87765DF03C5 | 1 | 2143615 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | 5317F87765DF03C5 | 1 | 2018766 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-30 | storm5510 | C-PRP | M2491117/1148448998417701439 : 5317F87765DF03C5 | | 2017-10-14 | Oliver Kruse | C-PRP | M2491117/1148448998417701439 : 5317F87765DF03C5 | | 2002-09-29 | -anonymous- | NF-PM1 | B1=10000 | | 1999-05-02 | -anonymous- | NF | no factor TF: 1-59 |
|
