| 5287823 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 20 / 280 |
Estimated T-Level: 20.4 ⓘ TF below 2^63 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-21 | Marc Honey | B41EB322E1B5EEE9 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-06-23 | Brian Gaboury | B41EB322E1B5EEE9 | 4681741 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-23 | Vamazing_ | 2CB406A5413B2795 | 1 | 3543654 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-24 | Carlos Pinho | CERT | Proof certified good | | 2025-02-23 | Vamazing_ | C-PRP | M5287823/1858197537870128022511579277087 : 2CB406A5413B2795 Proof Certified Good
Proof Power: 7
| | 2025-02-17 | fordobr | F-ECM | Factor: 1858197537870128022511579277087 / ECM curve 6, B1=50000, B2=60054225, Edwards Sigma=8199110822294592 | | 2021-10-15 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-09-17 | SRBase | NF | no factor TF: 71-72 | | 2021-08-23 | SRBase | NF | no factor TF: 70-71 | | 2021-08-19 | SRBase | NF | no factor TF: 69-70 | | 2020-09-29 | TJAOI | NF | no factor TF: 68-69 | | 2019-07-04 | USAFSS | NF-PM1 | B1=315000, B2=9371250 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-18 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-14 | snme2pm1 | 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 | | 2009-11-06 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-04 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-06-23 | BCG | C-LL | B41EB322E1B5EEE9 | | 2000-05-17 | BCG | NF-PM1 | B1=20000, B2=20000 | | 1998-07-21 | mhoney | C-LL | B41EB322E1B5EEE9 | | 1998-02-24 | -anonymous- | NF | no factor TF: 1-62 |
|
