| 2491381 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 230 / 280 |
Estimated T-Level: 24.1 ⓘ TF below 2^75 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David Cuciz | 6BA13E31EA74054F | 0 | Windows 16-bit,Prime95,v13,PFA,(aka WP0) | | Factored | 1998-05-01 | Roy Boyles | 6BA13E31EA74054F | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 1999-07-27 | Sauli Siren | 6BA13E31EA74054F | 1618695 | Linux 32-bit,Prime95,v18,(aka WU2) |
|
| 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 | 0AD4EC620A15ABC6 | 1 | 1195250 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | 0AD4EC620A15ABC6 | 1 | 162003 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-10 | LordJulius | NF | no factor TF: 1-60 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-11-30 | storm5510 | C-PRP | M2491381/14849906453944446877471 : 0AD4EC620A15ABC6 | | 2017-10-14 | Oliver Kruse | C-PRP | M2491381/14849906453944446877471 : 0AD4EC620A15ABC6 | | 2010-03-31 | James Classen | F-ECM | Factor: 14849906453944446877471 | | 2009-01-16 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-10-31 | Team Prime Rib | NF-PM1 | B1=15000, B2=228750 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-07-27 | -anonymous- | C-LL | 6BA13E31EA74054F | | 1999-05-02 | -anonymous- | NF | no factor TF: 1-59 | | 1998-05-01 | -anonymous- | C-LL | 6BA13E31EA74054F |
|
