| 5491579 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 71 / 280 |
Estimated T-Level: 21.3 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-08-16 | Gary Hanson | C365A6ACF811CD03 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-08-10 | Sid McHarg | C365A6ACF811CD03 | 182863 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-28 | Perig | FEF216015DAB0655 | 1 | 3437228 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-28 | protean | CERT | Proof certified good | | 2025-03-28 | Perig | C-PRP | M5491579/906224115347646563466337 : FEF216015DAB0655 Proof Certified Good
Proof Power: 7
| | 2025-03-23 | fordobr | F-ECM | Factor: 906224115347646563466337 / ECM curve 32, B1=50000, B2=64857975, Edwards Sigma=6505922036342095 | | 2022-08-11 | Sid & Andy | NF-PM1 | B1=5000000, B2=6421800462 | | 2021-10-11 | SRBase | NF | no factor TF: 71-72 | | 2021-08-24 | SRBase | NF | no factor TF: 70-71 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-08-24 | TJAOI | NF | no factor TF: 68-69 | | 2020-06-05 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2018-06-06 | ramgeis | NF | no factor TF: 67-68 | | 2016-07-10 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-26 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-11-20 | lycorn | NF | no factor TF: 64-65 | | 2014-11-20 | lycorn | NF | no factor TF: 63-64 | | 2010-05-20 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=1035000, E=6 | | 2009-05-03 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-08-10 | -anonymous- | C-LL | C365A6ACF811CD03 | | 2000-07-12 | -anonymous- | NF-PM1 | B1=20000, B2=60000 | | 1998-08-16 | garyh | C-LL | C365A6ACF811CD03 | | 1998-04-05 | -anonymous- | NF | no factor TF: 1-62 |
|
