| 2564459 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Assignments | | Assigned | User | Work Type | Stage | % Done | Updated | Est Complete | Expired |
|---|
| 2026-02-20 | MarkS | ECM | C16S1 | 95.44 % | 2026-02-22 | 2026-02-24 | |
|
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 85 / 280 |
Estimated T-Level: 21.5 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Joe Decker | A929523D4FF8886C | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-07-04 | Robert Mutschler | A929523D4FF8886C | 1218533 | 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 | 2978BAD9C580BDAD | 1 | 1565908 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | 2978BAD9C580BDAD | 1 | 1185055 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2017-12-01 | storm5510 | C-PRP | M2564459/1278800713403542576131437807 : 2978BAD9C580BDAD | | 2017-10-15 | Oliver Kruse | C-PRP | M2564459/1278800713403542576131437807 : 2978BAD9C580BDAD | | 2016-05-14 | mikr | F-PM1 | Factor: 1278800713403542576131437807 / B1=3200000, B2=112000000 | | 2016-02-23 | Mark Rose | NF | no factor TF: 59-60 | | 2015-11-08 | ramgeis | NF | no factor TF: 65-66 | | 2015-02-23 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-02-23 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-01-23 | dbaugh | NF | no factor TF: 62-63 | | 2012-06-17 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-04-16 | James Heinrich | NF-PM1 | B1=175000, B2=4112500, E=6 | | 2011-01-10 | Joss | NF-PM1 | B1=50000 | | 2011-01-03 | Joss | NF-PM1 | B1=30000 | | 2010-12-21 | Joss | NF-PM1 | B1=20000 | | 2009-02-01 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=198750 | | 2003-10-23 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-07-04 | bezahar | C-LL | A929523D4FF8886C | | 1999-03-15 | -anonymous- | NF | no factor TF: 1-59 |
|
