| 2258287 | Composite, with 5 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 185 / 640 |
Estimated T-Level: 26.4 ⓘ TF below 2^83 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 | ED054B0519C119D9 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-10-18 | Oliver Kruse | 5E78AEC2FB5B63C7 | 4 | 369780 | 5 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | 5E78AEC2FB5B63C7 | 4 | 505255 | 5 | 3 | | Verified | Certified Good | 2022-09-12 | seatsea | 5E78AEC2FB5B63C7 | 5 | 2245369 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-09-12 | VikkiMtF | CERT | Proof certified good | | 2022-09-12 | seatsea | C-PRP | M2258287/239378423/7827222743/9791119448681/32696599296353/14769532497428640607639 : 5E78AEC2FB5B63C7 Proof Certified Good
Proof Power: 7
| | 2022-09-12 | seatsea | F-ECM | Factor: 14769532497428640607639 / ECM curve 6, B1=50000, B2=38914785, Montgomery Sigma=2304417249827417 | | 2017-11-21 | storm5510 | C-PRP | M2258287/239378423/7827222743/9791119448681/32696599296353 : 5E78AEC2FB5B63C7 | | 2017-10-18 | Oliver Kruse | C-PRP | M2258287/239378423/7827222743/9791119448681/32696599296353 : 5E78AEC2FB5B63C7 | | 2017-10-10 | Oliver Kruse | C-PRP | M2258287/known_factors : ED054B0519C119D9 | | 2016-04-13 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2008-09-30 | markr | F | Factor: 32696599296353 | | 2008-09-30 | markr | F | Factor: 9791119448681 | | 2008-07-14 | George Woltman | F-ECM | Factor: 7827222743 |
|
