| 2550971 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 166 / 280 |
Estimated T-Level: 23.0 ⓘ TF below 2^71 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) | 2017-10-14 | Oliver Kruse | 77D57E048715C5FF | 3 | 481141 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | 77D57E048715C5FF | 3 | 657053 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-01 | storm5510 | C-PRP | M2550971/66325247/1025490343/109074196205969609 : 77D57E048715C5FF | | 2017-10-14 | Oliver Kruse | C-PRP | M2550971/66325247/1025490343/109074196205969609 : 77D57E048715C5FF | | 2015-04-16 | TJAOI | F | Factor: 109074196205969609 | | 2008-07-14 | George Woltman | F-ECM | Factor: 1025490343 |
|
