| 2105863 | 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 | 156 / 640 |
Estimated T-Level: 26.2 ⓘ TF below 2^82 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) | 2017-10-07 | Oliver Kruse | 8B30D3A4ABCB86CC | 1 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-17 | kkmrkkblmbrbk | 8B30D3A4ABCB86CC | 1 | 1367366 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-23 | kkmrkkblmbrbk | 0021446FC88AADC1 | 2 | 562389 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-23 | storm5510 | 0021446FC88AADC1 | 2 | 107592 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-11-23 | storm5510 | C-PRP | M2105863/138986959/28260463235229491881 : 0021446FC88AADC1 | | 2017-11-23 | kkmrkkblmbrbk | C-PRP | M2105863/138986959/28260463235229491881 : 0021446FC88AADC1 | | 2017-11-22 | TJAOI | F | Factor: 28260463235229491881 | | 2017-11-17 | kkmrkkblmbrbk | C-PRP | M2105863/138986959 : 8B30D3A4ABCB86CC | | 2017-10-07 | Oliver Kruse | C-PRP | M2105863/138986959 : 8B30D3A4ABCB86CC | | 2016-03-16 | alpertron | NF-PM1 | B1=500000, B2=15000000, E=12 |
|
