| 5476223 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 15 / 280 |
Estimated T-Level: 20.3 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-12-27 | Marc Getty / Phil Fizur | 69871A15697658BF | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2001-06-03 | Laurie A. Riley | 69871A15697658BF | 4701416 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-26 | Perig | 3A71D152FD2A793A | 1 | 1628239 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-26 | zar | CERT | Proof certified good | | 2025-03-26 | Perig | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-21 | Andrey Dobrynin | F-ECM | Factor: 236100917089770649741193 / ECM curve 3, B1=50000, B2=88250000, Edwards Sigma=4561150628732338 | | 2021-11-15 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-08-22 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-08-31 | TJAOI | NF | no factor TF: 68-69 | | 2019-09-23 | USAFSS | NF-PM1 | B1=330000, B2=9817500 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-04 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-24 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-30 | monst | NF | no factor TF: 64-65 | | 2014-12-30 | snme2pm1 | NF | no factor TF: 63-64 | | 2010-11-11 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2009-05-05 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2001-06-03 | -anonymous- | C-LL | 69871A15697658BF | | 2001-04-15 | -anonymous- | NF-PM1 | B1=25000, B2=268750 | | 2000-07-12 | -anonymous- | NF-PM1 | B1=25000, B2=187500 | | 1999-01-10 | -anonymous- | C-LL | 69871A15697658BF | | 1998-12-27 | -anonymous- | C-LL | 69871A15697658BF | | 1998-06-14 | -anonymous- | NF | no factor TF: 1-62 | | 1998-03-31 | -anonymous- | NF | no factor TF: 1-61 |
|
