| 2507861 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 153 / 280 |
Estimated T-Level: 22.7 ⓘ 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 |
|---|
| Factored | PRP without proof (not generated) | 2017-10-14 | Oliver Kruse | 9B42B59B14AE026C | 1 | 721405 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-11-30 | storm5510 | 9B42B59B14AE026C | 1 | 831328 | 5 | 3 | | Verified | Certified Good | 2022-08-21 | LordJulius | 9B42B59B14AE026C | 2 | 1592021 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-08-21 | Chad Steenerson | CERT | Proof certified good | | 2022-08-21 | LordJulius | C-PRP | M2507861/31727626633471/9515204117840672462191 : 9B42B59B14AE026C Proof Certified Good
Proof Power: 7
| | 2022-08-20 | USAFSS | F-PM1 | Factor: 9515204117840672462191 / B1=240000, B2=199861200 | | 2017-11-30 | storm5510 | C-PRP | M2507861/31727626633471 : 9B42B59B14AE026C | | 2017-10-14 | Oliver Kruse | C-PRP | M2507861/31727626633471 : 9B42B59B14AE026C |
|
