| 2312861 | 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 |
|---|
| Verified | PRP without proof (not generated) | 2017-10-11 | Oliver Kruse | 2AF8C81EF7A5FDC4 | 2 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-22 | storm5510 | 2AF8C81EF7A5FDC4 | 2 | 564121 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2021-04-08 | ViliamF | NF-PM1 | B1=5000000, B2=505000000 | | 2018-02-26 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2017-11-22 | storm5510 | C-PRP | M2312861/185028881/63460280119 : 2AF8C81EF7A5FDC4 | | 2017-10-11 | Oliver Kruse | C-PRP | M2312861/185028881/63460280119 : 2AF8C81EF7A5FDC4 | | 2008-07-14 | George Woltman | F-ECM | Factor: 63460280119 |
|
