| 4345249 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 157 / 280 |
Estimated T-Level: 22.8 ⓘ TF below 2^71 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Bad | 1998-03-17 | Christopher Lund | CDAE7639822EFA1C | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 1999-12-15 | Mike Wood | 315707D80B1ADD13 | 1709710 | Windows,Prime95,v18,(aka WU1) | | Factored | 2001-05-27 | Marc Getty / Phil Fizur | 315707D80B1ADD13 | 1388394 | Windows,Prime95,v20,NT service,(aka WW5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-24 | fordobr | EFD880172B2893D2 | 1 | 544926 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-24 | Noodles | CERT | Proof certified good | | 2025-01-24 | fordobr | C-PRP | M4345249/19375460139996998647829711 : EFD880172B2893D2 Proof Certified Good
Proof Power: 7
| | 2025-01-24 | fordobr | F-ECM | Factor: 19375460139996998647829711 / ECM curve 34, B1=68333, B2=117709515, Edwards Sigma=6859339209245467 | | 2022-12-06 | DRobinsonPE | NF-PM1 | B1=6200000, B2=29438922240 | | 2021-02-10 | -anonymous- | NF | no factor TF: 72-73 | | 2021-01-30 | -anonymous- | NF | no factor TF: 71-72 | | 2021-01-30 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-26 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-26 | -anonymous- | NF | no factor TF: 68-69 | | 2018-10-26 | chuenkit | NF | no factor TF: 67-68 | | 2018-05-02 | chuenkit | NF | no factor TF: 66-67 | | 2016-12-30 | Ismo Laitela | NF-PM1 | B1=2098905, B2=65066057, E=12 | | 2016-12-29 | Squeeky_Squirrel | NF-PM1 | B1=265000, B2=7817500, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-16 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-06-17 | lycorn | NF | no factor TF: 64-65 | | 2014-06-17 | Jayder | NF | no factor TF: 63-64 | | 2012-01-14 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-12-14 | Squeeky_Squirrel | NF-PM1 | B1=80000, B2=1440000, E=6 | | 2010-11-28 | markr | NF | no factor TF: 61-62 | | 2002-03-31 | David Campeau | NF | no factor TF: 1-61 | | 2001-05-27 | -anonymous- | C-LL | 315707D80B1ADD13 | | 2001-05-20 | -anonymous- | NF-PM1 | B1=25000, B2=312500 | | 2001-03-05 | -anonymous- | NF-PM1 | B1=20000, B2=200000 | | 1999-12-15 | -anonymous- | C-LL | 315707D80B1ADD13 | | 1998-03-17 | -anonymous- | C-LL | CDAE7639822EFA1C | | 1998-02-08 | -anonymous- | NF | no factor TF: 1-60 |
|
