| 2608439 | 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 | | Andy Kohler | C5B82A04A698B280 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | | Edesio Costa e Silva | C5B82A04A698B280 | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 1999-04-23 | Sam Gompers | C5B82A04A698B280 | 1585143 | 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) | 2017-10-15 | Oliver Kruse | C73B540EE740F40D | 1 | 1685580 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-02 | storm5510 | C73B540EE740F40D | 1 | 1099101 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-11 | LordJulius | NF | no factor TF: 1-60 | | 2019-07-04 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-02 | storm5510 | C-PRP | M2608439/503433945162588388087 : C73B540EE740F40D | | 2017-10-15 | Oliver Kruse | C-PRP | M2608439/503433945162588388087 : C73B540EE740F40D | | 2011-01-25 | Oscar Östlin | F-PM1 | Factor: 503433945162588388087 | | 2011-01-19 | Joss | NF-PM1 | B1=50000 | | 2010-12-26 | Joss | NF-PM1 | B1=30000 | | 2010-12-21 | Joss | NF-PM1 | B1=20000 | | 2009-01-31 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=217500 | | 2003-10-31 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-04-23 | -anonymous- | C-LL | C5B82A04A698B280 | | 1999-03-26 | -anonymous- | NF | no factor TF: 1-59 |
|
