| 2491087 | Composite, with 5 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 227 / 280 |
Estimated T-Level: 24.1 ⓘ TF below 2^75 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) | 2017-10-14 | Oliver Kruse | A88C9B4455A016D9 | 5 | 577459 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | A88C9B4455A016D9 | 5 | 544800 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-30 | storm5510 | C-PRP | M2491087/26031859151/27959960489/3914414397017/30583498583791/40776563111089303 : A88C9B4455A016D9 | | 2017-10-14 | Oliver Kruse | C-PRP | M2491087/26031859151/27959960489/3914414397017/30583498583791/40776563111089303 : A88C9B4455A016D9 | | 2015-01-10 | TJAOI | F | Factor: 40776563111089303 | | 2008-09-30 | markr | F | Factor: 30583498583791 | | 2008-07-14 | George Woltman | F-ECM | Factor: 3914414397017 | | 2008-07-14 | George Woltman | F-ECM | Factor: 27959960489 |
|
