| 2509621 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 192 / 280 |
Estimated T-Level: 23.4 ⓘ TF below 2^73 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | William H. Erskine | 619898DFEE4C3833 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-06-06 | chris clark | 619898DFEE4C3833 | 71404 | 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 | E6D881EB762C356B | 1 | 4849 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-30 | storm5510 | E6D881EB762C356B | 1 | 2000287 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-01-28 | USAFSS | NF-PM1 | B1=288000, B2=290589390 | | 2022-03-10 | LordJulius | NF | no factor TF: 1-60 | | 2017-11-30 | storm5510 | C-PRP | M2509621/149222563677331091911 : E6D881EB762C356B | | 2017-10-14 | Oliver Kruse | C-PRP | M2509621/149222563677331091911 : E6D881EB762C356B | | 2011-10-03 | markr | F-PM1 | Factor: 149222563677331091911 | | 2011-01-04 | Joss | NF-PM1 | B1=50000 | | 2011-01-01 | Joss | NF-PM1 | B1=30000 | | 2010-12-16 | Joss | NF-PM1 | B1=20000 | | 2009-01-29 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-10-31 | Team Prime Rib | NF-PM1 | B1=15000, B2=236250 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-08-16 | -anonymous- | NF | no factor TF: 1-59 | | 1999-06-06 | -anonymous- | C-LL | 619898DFEE4C3833 |
|
