| 2639639 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 215 / 280 |
Estimated T-Level: 23.8 ⓘ TF below 2^74 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 | DA8E2EFD1CBFB6A2 | 4 | 2222606 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | storm5510 | DA8E2EFD1CBFB6A2 | 4 | 54752 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2639639/5279279/19623076327/47513503/3106635126044297 : DA8E2EFD1CBFB6A2 | | 2017-10-18 | Oliver Kruse | C-PRP | M2639639/5279279/19623076327/47513503/3106635126044297 : DA8E2EFD1CBFB6A2 | | 2014-06-27 | TJAOI | F | Factor: 3106635126044297 | | 2008-07-14 | George Woltman | F-ECM | Factor: 47513503 | | 2008-07-14 | George Woltman | F-ECM | Factor: 19623076327 |
|
