| 5252917 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 61 / 280 |
Estimated T-Level: 21.1 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Lindsey Smith | 48C140D52CD2C1FC | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 2001-08-24 | Marc Getty / Phil Fizur | 48C140D52CD2C1FC | 4592090 | Windows,Prime95,v20,NT service,(aka WW5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-21 | Jason Lynch | BF7BBA80E11A1744 | 1 | 442343 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-21 | Shadwick76 | CERT | Proof certified good | | 2025-02-21 | Jason Lynch | C-PRP | M5252917/24915466196850911849801 : BF7BBA80E11A1744 Proof Certified Good
Proof Power: 7
| | 2025-02-13 | Ruslan Borisov | F-ECM | Factor: 24915466196850911849801 / ECM curve 29, B1=50000, B2=45000000, Edwards Sigma=5091234290079370 | | 2025-02-11 | Jason Lynch | NF-PM1 | B1=14338000, B2=236501295030 | | 2021-09-22 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-17 | SRBase | NF | no factor TF: 71-72 | | 2021-08-24 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-12-21 | TJAOI | NF | no factor TF: 68-69 | | 2019-05-25 | USAFSS | NF-PM1 | B1=315000, B2=9922500 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-03 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-12 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-07-11 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-09 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2002-10-19 | David Campeau | NF | no factor TF: 1-62 | | 2001-08-24 | -anonymous- | C-LL | 48C140D52CD2C1FC | | 2001-08-18 | -anonymous- | NF-PM1 | B1=25000, B2=337500 | | 2000-11-25 | TeraTism | NF-PM1 | B1=20000, B2=20000 |
|
