| 2257799 | Composite, with 5 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 152 / 640 |
Estimated T-Level: 26.2 ⓘ TF below 2^82 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) | 2017-10-10 | Oliver Kruse | 79692BC72002C5EE | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-18 | Oliver Kruse | 0F8F280CF5DB4943 | 4 | 928469 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | 0F8F280CF5DB4943 | 4 | 312836 | 5 | 3 | | Verified | Certified Good | 2025-10-28 | Sidi | 0F8F280CF5DB4943 | 5 | 1327991 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-10-29 | Chuck | CERT | Proof certified good | | 2025-10-28 | Sidi | C-PRP | M2257799/234811097/39954065291177/215894122562903/50972889917479905799/938407119794266445819047 : 0F8F280CF5DB4943 Proof Certified Good
Proof Power: 7
| | 2025-10-21 | TJAOI | F-ECM | Factor: 938407119794266445819047 / ECM curve 45, B1=250000, B2=251325195, Edwards Sigma=8006407307024551 | | 2017-11-21 | storm5510 | C-PRP | M2257799/234811097/39954065291177/215894122562903/50972889917479905799 : 0F8F280CF5DB4943 | | 2017-10-18 | Oliver Kruse | C-PRP | M2257799/234811097/39954065291177/215894122562903/50972889917479905799 : 0F8F280CF5DB4943 | | 2017-10-10 | Oliver Kruse | C-PRP | M2257799/known_factors : 79692BC72002C5EE | | 2016-04-13 | alpertron | F-PM1 | Factor: 50972889917479905799 / B1=500000, B2=15000000 | | 2014-03-11 | TJAOI | F | Factor: 215894122562903 | | 2014-01-15 | TJAOI | F | Factor: 39954065291177 |
|
