| 5205979 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 28 / 280 |
Estimated T-Level: 20.5 ⓘ TF below 2^63 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-09-13 | Palle Mathiasen | D8025DD0F8F80039 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-08-10 | John F. Kushneir III | D8025DD0F8F80039 | 3842475 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-09 | jeriffee | 968C4BC71BBE9343 | 1 | 1343478 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-09 | Massimo Cappelli (ik5pwa) | CERT | Proof certified good | | 2025-02-09 | jeriffee | C-PRP | M5205979/31610568014118668578361 : 968C4BC71BBE9343 Proof Certified Good
Proof Power: 7
| | 2025-02-04 | fordobr | F-ECM | Factor: 31610568014118668578361 / ECM curve 9, B1=50000, B2=88280115, Edwards Sigma=5486130335866572 | | 2025-01-26 | Jason Lynch | NF-PM1 | B1=13161000, B2=259687668240 | | 2024-07-29 | tbusby | NF | no factor TF: 72-73 | | 2021-09-16 | SRBase | NF | no factor TF: 71-72 | | 2021-09-05 | axn | NF-PM1 | B1=8000000, B2=400000000 | | 2021-08-23 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-12-14 | TJAOI | NF | no factor TF: 68-69 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2018-04-01 | Squeeky_Squirrel | NF-PM1 | B1=310000, B2=9222500, E=12 | | 2016-05-28 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-10 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-19 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-06-06 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-18 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-08-10 | -anonymous- | C-LL | D8025DD0F8F80039 | | 2000-07-17 | -anonymous- | NF-PM1 | B1=25000, B2=275000 | | 1998-09-13 | -anonymous- | C-LL | D8025DD0F8F80039 | | 1998-08-24 | -anonymous- | NF | no factor TF: 1-62 |
|
