| 2617271 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 120 / 280 |
Estimated T-Level: 22.1 ⓘ 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 |
|---|
| Factored | PRP without proof (not generated) | 2017-10-17 | Oliver Kruse | EBFE8E6D957EDD67 | 1 | 724316 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-02 | storm5510 | EBFE8E6D957EDD67 | 1 | 1053703 | 5 | 3 | | Verified | Certified Good | 2025-08-05 | BUROMIECZ | EBFE8E6D957EDD67 | 2 | 1694479 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-08-05 | Poao | CERT | Proof certified good | | 2025-08-05 | BUROMIECZ | C-PRP | M2617271/5234543/286700529507334107772203481 : EBFE8E6D957EDD67 Proof Certified Good
Proof Power: 7
| | 2025-08-05 | BUROMIECZ | F-ECM | Factor: 286700529507334107772203481 / ECM curve 35, B1=65384, B2=19025370, Edwards Sigma=3128036632458659 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2617271/5234543 : EBFE8E6D957EDD67 | | 2017-10-17 | Oliver Kruse | C-PRP | M2617271/5234543 : EBFE8E6D957EDD67 |
|
