| 2491043 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 248 / 280 |
Estimated T-Level: 24.4 ⓘ TF below 2^76 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David Cuciz | ED5C610493D8D10B | 0 | Windows 16-bit,Prime95,v13,PFA,(aka WP0) | | Bad | | Marco Mantovanelli | E14F1A0D22EBB1CC | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-10-15 | Leonid Papirov | ED5C610493D8D10B | 1397420 | Windows,Prime95,v18,(aka WU1) |
|
| 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 | B48455CAB4CF21D6 | 1 | 1377599 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | B48455CAB4CF21D6 | 1 | 2325238 | 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 | M2491043/141348940424145186167 : B48455CAB4CF21D6 | | 2017-10-14 | Oliver Kruse | C-PRP | M2491043/141348940424145186167 : B48455CAB4CF21D6 | | 2014-11-27 | mikr | F-PM1 | Factor: 141348940424145186167 / B1=2382500 | | 2014-09-10 | Joss | NF-PM1 | B1=120766 | | 2013-01-14 | dbaugh | NF | no factor TF: 62-63 | | 2012-06-11 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-01-21 | Oscar Östlin | NF-PM1 | B1=95000, B2=1947500, E=6 | | 2010-12-22 | Joss | NF-PM1 | B1=20000 | | 2009-01-15 | 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 | | 1999-10-15 | -anonymous- | C-LL | ED5C610493D8D10B | | 1999-05-02 | -anonymous- | NF | no factor TF: 1-59 |
|
