| 2258203 | 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 | 138 / 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 | | Charlie Dorian | BE969DCCF86981E8 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-03-01 | Carl Mikkelsen | BE969DCCF86981E8 | 603196 | Windows,Prime95,v17,NT service,(aka WT5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-10 | Oliver Kruse | FB7EA199FF864964 | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-21 | storm5510 | FB7EA199FF864964 | 1 | 2135843 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-21 | storm5510 | C-PRP | M2258203/422140780982235128761 : FB7EA199FF864964 | | 2017-10-10 | Oliver Kruse | C-PRP | M2258203/422140780982235128761 : FB7EA199FF864964 | | 2016-04-13 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 | | 2002-06-23 | -anonymous- | F-PM1 | Factor: 422140780982235128761 | | 1999-03-01 | foxkid | C-LL | BE969DCCF86981E8 |
|
