| 5216933 | 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 | 1998-09-27 | Chris Raile | 870808B4AB0E16C8 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-06-11 | Bruce A Metcalf | 870808B4AB0E16C8 | 1211332 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-11 | jeriffee | DD59D91373F1D4E4 | 1 | 4366012 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-11 | hisakazu1961 | CERT | Proof certified good | | 2025-02-11 | jeriffee | C-PRP | M5216933/614363177796656720615489 : DD59D91373F1D4E4 Proof Certified Good
Proof Power: 7
| | 2025-02-06 | Samuel Schmidt | F-ECM | Factor: 614363177796656720615489 / ECM curve 3, B1=50000, B2=75069225, Edwards Sigma=2577632791832491 | | 2022-06-08 | Sid & Andy | NF-PM1 | B1=7000000, B2=5897630310 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-08-31 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-11-23 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2018-05-31 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9222500, E=12 | | 2016-05-30 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-01-25 | Numberwang | 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 | | 2009-10-23 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-18 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-06-11 | Bruce A Metcalf | C-LL | 870808B4AB0E16C8 | | 2000-05-10 | Bruce A Metcalf | NF-PM1 | B1=20000, B2=190000 | | 1998-09-27 | -anonymous- | C-LL | 870808B4AB0E16C8 | | 1998-09-20 | -anonymous- | NF | no factor TF: 1-61 | | 1998-08-09 | -anonymous- | NF | no factor TF: 1-62 |
|
