| 2615903 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 195 / 280 |
Estimated T-Level: 23.5 ⓘ TF below 2^73 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) | 2017-10-17 | Oliver Kruse | E39384B4E8DAB170 | 2 | 1888390 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | storm5510 | E39384B4E8DAB170 | 2 | 634529 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2021-07-18 | ATH | NF-PP1 | Start=2/7, B1=1000000, B2=100000000 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2615903/62781673/68013479 : E39384B4E8DAB170 | | 2017-10-17 | Oliver Kruse | C-PRP | M2615903/62781673/68013479 : E39384B4E8DAB170 | | 2008-07-14 | George Woltman | F-ECM | Factor: 68013479 |
|
