| 4358411 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 103 / 280 |
Estimated T-Level: 21.8 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-05-08 | Bob Proctor | 2D33315384E11940 | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 2000-03-28 | Tamas Vincze | 2D33315384E11940 | 4306194 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-21 | Andrey Dobrynin | C61F4EB79A835666 | 1 | 3705291 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-21 | Cong Shengzhuo | CERT | Proof certified good | | 2025-02-21 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-02-21 | Andrey Dobrynin | F-ECM | Factor: 241955655353176463710638951125663 / ECM curve 12, B1=73178, B2=117709515, Edwards Sigma=858714431137307 | | 2022-12-18 | DRobinsonPE | NF-PM1 | B1=6200000, B2=32177450760 | | 2021-01-29 | -anonymous- | NF | no factor TF: 71-72 | | 2021-01-29 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-25 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-25 | -anonymous- | NF | no factor TF: 68-69 | | 2018-10-27 | chuenkit | NF | no factor TF: 67-68 | | 2018-10-02 | Ismo Laitela | NF-PM1 | B1=2189464, B2=63494458, E=12 | | 2018-05-02 | chuenkit | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-18 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-07-01 | lycorn | NF | no factor TF: 64-65 | | 2014-07-01 | Jayder | NF | no factor TF: 63-64 | | 2012-01-15 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-12-27 | Squeeky_Squirrel | NF-PM1 | B1=110000, B2=2227500, E=6 | | 2010-11-19 | markr | NF | no factor TF: 61-62 | | 2009-07-26 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2002-04-07 | David Campeau | NF | no factor TF: 1-61 | | 2000-03-28 | -anonymous- | C-LL | 2D33315384E11940 | | 1998-05-08 | -anonymous- | C-LL | 2D33315384E11940 | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-60 |
|
