| 4551517 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 106 / 280 |
Estimated T-Level: 21.9 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-05 | Ars Technica Team Prime Rib | 7A28004FBA896526 | 0 | Linux 32-bit,Prime95,v16,(aka WS2) | | Factored | 2001-08-26 | Martín-Blas Pérez Pinilla | 7A28004FBA896526 | 3208538 | Linux 32-bit,Prime95,v18,(aka WU2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-18 | fordobr | 64FBE8F38F3C26AA | 1 | 2758060 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-19 | Ghiloar | CERT | Proof certified good | | 2025-03-18 | fordobr | C-PRP | M4551517/1792835635818493435693793 : 64FBE8F38F3C26AA Proof Certified Good
Proof Power: 7
| | 2025-03-18 | fordobr | F-ECM | Factor: 1792835635818493435693793 / ECM curve 17, B1=69679, B2=64857975, Edwards Sigma=3720911917535360 | | 2022-11-17 | Sid & Andy | NF-PM1 | B1=4400000, B2=11369400900 | | 2021-04-10 | Dylan Delgado | NF-PM1 | B1=480000, B2=14400000, E=12 | | 2021-02-19 | -anonymous- | NF | no factor TF: 72-73 | | 2021-02-06 | -anonymous- | NF | no factor TF: 71-72 | | 2021-01-27 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-27 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-27 | -anonymous- | NF | no factor TF: 68-69 | | 2018-05-21 | ramgeis | NF | no factor TF: 67-68 | | 2018-05-21 | ramgeis | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-30 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-04 | lycorn | NF | no factor TF: 64-65 | | 2014-12-04 | Jayder | NF | no factor TF: 63-64 | | 2012-09-24 | Squeeky_Squirrel | NF-PM1 | B1=295000, B2=7670000, E=12 | | 2011-12-28 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-07-08 | USAFSS | NF-PM1 | B1=55000, B2=866250, E=6 | | 2010-08-30 | markr | NF | no factor TF: 61-62 | | 2001-08-26 | -anonymous- | C-LL | 7A28004FBA896526 | | 2001-04-01 | -anonymous- | NF-PM1 | B1=20000, B2=250000 | | 1998-07-05 | -anonymous- | C-LL | 7A28004FBA896526 | | 1998-06-01 | -anonymous- | NF | no factor TF: 1-61 | | 1998-05-23 | -anonymous- | NF | no factor TF: 1-60 |
|
