| 262147 | Composite, with 2 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 244 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 602 / 640 |
Estimated T-Level: 29.7 ⓘ TF below 2^94 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 | No proof (small exponent) | 2017-09-22 | Oliver Kruse | 4842F8D65E57075E | 2 | 0 | 1 | 3 | | Verified | No proof (small exponent) | 2017-10-12 | kkmrkkblmbrbk | 4842F8D65E57075E | 2 | 194971 | 1 | 3 | | Verified | No proof (small exponent) | 2020-04-17 | Oliver Kruse | 5861E0DA25E1D890 | 2 | 67287 | 5 | 3 | | Verified | Certified Good | 2024-07-29 | kkmrkkblmbrbk | 5861E0DA25E1D890 | 2 | 39355 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2024-07-29 | Dustin Swisher | CERT | Proof certified good | | 2024-07-29 | kkmrkkblmbrbk | C-PRP | M262147/268179002471/1268420128851329 : 5861E0DA25E1D890 Proof Certified Good
Proof Power: 5
| | 2021-12-29 | Luminescence | NF-PM1 | B1=300000000, B2=32473053562950 | | 2020-04-17 | Oliver Kruse | C-PRP | M262147/268179002471/1268420128851329 : 5861E0DA25E1D890 | | 2017-10-12 | kkmrkkblmbrbk | C-PRP | M262147/268179002471/1268420128851329 : 4842F8D65E57075E | | 2017-09-22 | Oliver Kruse | C-PRP | M262147/268179002471/1268420128851329 : 4842F8D65E57075E | | 2017-09-22 | Oliver Kruse | C-PRP | M262147/268179002471/1268420128851329 : 4842F8D65E57075E | | 2014-05-21 | TJAOI | F | Factor: 1268420128851329 |
|
