| 2501189 | Composite, with 4 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 56 / 640 |
Estimated T-Level: 25.4 ⓘ TF below 2^80 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 | ED91315034B45CFA | 4 | 1590179 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | ED91315034B45CFA | 4 | 1112026 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-08-18 | USAFSS | NF-PM1 | B1=240000, B2=200595780 | | 2022-03-10 | LordJulius | NF | no factor TF: 66-67 | | 2022-03-10 | LordJulius | NF | no factor TF: 63-64 | | 2022-03-10 | LordJulius | NF | no factor TF: 64-65 | | 2022-03-10 | LordJulius | NF | no factor TF: 65-66 | | 2022-03-10 | LordJulius | NF | no factor TF: 62-63 | | 2021-12-14 | ANONYMOUS | NF | no factor TF: 67-68 | | 2017-11-30 | storm5510 | C-PRP | M2501189/20009513/300142681/353578416955327/433233322499397809 : ED91315034B45CFA | | 2017-10-14 | Oliver Kruse | C-PRP | M2501189/20009513/300142681/353578416955327/433233322499397809 : ED91315034B45CFA | | 2015-09-16 | TJAOI | F | Factor: 433233322499397809 | | 2014-04-02 | TJAOI | F | Factor: 353578416955327 | | 2008-07-14 | George Woltman | F-ECM | Factor: 300142681 |
|
