| 4941487 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 124 / 280 |
Estimated T-Level: 22.2 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-06-01 | Willem Mulder | CFDCC911D1492E7D | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 2000-07-03 | Todd Lewis | CFDCC911D1492E7D | 2001954 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-21 | fordobr | 1E17A5E679EF8109 | 1 | 3709981 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-21 | BA24Cx | CERT | Proof certified good | | 2025-03-21 | fordobr | C-PRP | M4941487/15683378099210528388438703 : 1E17A5E679EF8109 Proof Certified Good
Proof Power: 7
| | 2025-03-21 | fordobr | F-ECM | Factor: 15683378099210528388438703 / ECM curve 45, B1=50000, B2=60054225, Edwards Sigma=4543323941409027 | | 2023-04-08 | Sid & Andy | NF-PM1 | B1=4000000, B2=10417702680 | | 2021-04-26 | -anonymous- | NF | no factor TF: 71-72 | | 2021-04-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-23 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-18 | TJAOI | NF | no factor TF: 68-69 | | 2018-05-23 | ramgeis | NF | no factor TF: 67-68 | | 2018-02-17 | nordi | NF-PM1 | B1=2000000, B2=58000000, E=12 | | 2017-10-26 | Yxinity | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-26 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-31 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-31 | VictordeHollander | NF | no factor TF: 63-64 | | 2011-09-11 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-01-09 | markr | NF | no factor TF: 61-62 | | 2009-12-14 | markr | NF-PM1 | B1=100000, B2=2500000, E=6 | | 2000-07-03 | Todd | C-LL | CFDCC911D1492E7D | | 2000-05-31 | Todd | NF-PM1 | B1=20000, B2=20000 | | 1998-06-01 | -anonymous- | C-LL | CFDCC911D1492E7D | | 1998-04-11 | -anonymous- | NF | no factor TF: 1-61 |
|
