| 2572261 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 134 / 280 |
Estimated T-Level: 22.4 ⓘ 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) | 2017-10-15 | Oliver Kruse | 4B7FAD0ED05FA2E3 | 1 | 848943 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-12-01 | storm5510 | 4B7FAD0ED05FA2E3 | 1 | 1495354 | 5 | 3 | | Verified | Certified Good | 2024-04-08 | Anton Tsvetkov | 4B7FAD0ED05FA2E3 | 2 | 297702 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2024-04-08 | JParent | CERT | Proof certified good | | 2024-04-08 | Anton Tsvetkov | C-PRP | M2572261/77908641169/399770518120768422350423 : 4B7FAD0ED05FA2E3 Proof Certified Good
Proof Power: 7
| | 2024-04-08 | Anton Tsvetkov | F-ECM | Factor: 399770518120768422350423 / ECM curve 24, B1=50000, B2=13718250, Edwards Sigma=6887021531558548 | | 2022-09-01 | USAFSS | NF-PM1 | B1=300000, B2=258641460 | | 2017-12-01 | storm5510 | C-PRP | M2572261/77908641169 : 4B7FAD0ED05FA2E3 | | 2017-10-15 | Oliver Kruse | C-PRP | M2572261/77908641169 : 4B7FAD0ED05FA2E3 |
|
