| 2640251 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 128 / 280 |
Estimated T-Level: 22.3 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-18 | Oliver Kruse | 1955B14338A2D0D2 | 4 | 2124143 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | storm5510 | 1955B14338A2D0D2 | 4 | 357629 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-11 | LordJulius | NF | no factor TF: 61-62 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2640251/5280503/2583306066433/1295269923664148017/7186373741297187457 : 1955B14338A2D0D2 | | 2017-10-18 | Oliver Kruse | C-PRP | M2640251/5280503/2583306066433/1295269923664148017/7186373741297187457 : 1955B14338A2D0D2 | | 2016-09-15 | TJAOI | F | Factor: 7186373741297187457 | | 2016-01-18 | TJAOI | F | Factor: 1295269923664148017 | | 2008-07-14 | George Woltman | F-ECM | Factor: 2583306066433 |
|
