| 2291917 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 120 / 640 |
Estimated T-Level: 25.9 ⓘ TF below 2^81 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) | 2017-10-11 | Oliver Kruse | 9F5AFA18DA92BA83 | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-22 | storm5510 | 9F5AFA18DA92BA83 | 1 | 1712832 | 1 | 3 | | Verified | Certified Good | 2022-10-20 | Kevin_9611 | 605BBF5857DB6872 | 2 | 1623424 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-10-20 | ANONYMOUS | CERT | Proof certified good | | 2022-10-20 | Kevin_9611 | C-PRP | Proof Certified Good
Proof Power: 7
| | 2022-10-20 | _p95holder_ | F-ECM | Factor: 680395353844890494023 | | 2017-11-22 | storm5510 | C-PRP | M2291917/6339442423 : 9F5AFA18DA92BA83 | | 2017-10-11 | Oliver Kruse | C-PRP | M2291917/6339442423 : 9F5AFA18DA92BA83 | | 2016-04-23 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 |
|
