| 2263931 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 144 / 640 |
Estimated T-Level: 26.1 ⓘ TF below 2^82 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Mark Langezaal | 0256C7AD9CFF9A43 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-03-15 | Jack Woodrow | 0256C7AD9CFF9A43 | 1122309 | Windows,Prime95,v17,(aka WT1) |
|
| 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 | 7CE5C802E724E0C0 | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-21 | storm5510 | 7CE5C802E724E0C0 | 1 | 1367534 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-21 | storm5510 | C-PRP | M2263931/16426554078666236209 : 7CE5C802E724E0C0 | | 2017-10-11 | Oliver Kruse | C-PRP | M2263931/16426554078666236209 : 7CE5C802E724E0C0 | | 2016-04-19 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2008-12-28 | oodaira | F-ECM | Factor: 16426554078666236209 | | 1999-03-15 | -anonymous- | C-LL | 0256C7AD9CFF9A43 |
|
