| 2428661 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 153 / 280 |
Estimated T-Level: 22.7 ⓘ TF below 2^71 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Harvey Seargeant | C04DC719E757665F | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-10-15 | David Logan | C04DC719E757665F | 2183566 | 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) | 2017-10-13 | Oliver Kruse | 80C9CC27D95AA5BD | 1 | 554494 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-11-27 | nokno | ABE82E1583306B10 | 1 | 0 | 1 | 3 | | Verified | PRP without proof (not generated) | 2017-11-27 | storm5510 | 80C9CC27D95AA5BD | 1 | 892299 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-04 | kkmrkkblmbrbk | ABE82E1583306B10 | 1 | 44110 | 1 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-10 | LordJulius | NF | no factor TF: 1-60 | | 2018-09-28 | alpertron | NF-PM1 | B1=2000000, B2=60000000, E=12 | | 2017-12-04 | kkmrkkblmbrbk | C-PRP | M2428661/1082894272153874474993 : ABE82E1583306B10 | | 2017-11-27 | storm5510 | C-PRP | M2428661/1082894272153874474993 : 80C9CC27D95AA5BD | | 2017-11-27 | nokno | C-PRP | M2428661/1082894272153874474993 : ABE82E1583306B10 | | 2017-10-13 | Oliver Kruse | C-PRP | M2428661/1082894272153874474993 : 80C9CC27D95AA5BD | | 2010-10-12 | Oscar Östlin | F-PM1 | Factor: 1082894272153874474993 | | 2009-01-11 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-10-08 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-10-15 | -anonymous- | C-LL | C04DC719E757665F | | 1999-07-30 | -anonymous- | NF | no factor TF: 1-59 |
|
