| 4196987 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 215 / 280 |
Estimated T-Level: 23.8 ⓘ TF below 2^74 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Jay | 13429C61631E9621 | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 1999-10-29 | Alexander Krylov | 13429C61631E9621 | 4024436 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-08 | fordobr | 4AC0E26F42B6877A | 1 | 2691398 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-08 | ANONYMOUS | CERT | Proof certified good | | 2025-01-08 | fordobr | C-PRP | M4196987/1013812123653252364262617 : 4AC0E26F42B6877A Proof Certified Good
Proof Power: 7
| | 2025-01-08 | fordobr | F-ECM | Factor: 1013812123653252364262617 / ECM curve 48, B1=74166, B2=127120524, Edwards Sigma=7176311590249343 | | 2024-11-24 | Andrew B | NF | no factor TF: 71-72 | | 2022-12-15 | DRobinsonPE | NF-PM1 | B1=6200000, B2=33322740360 | | 2022-06-03 | mikr | NF | no factor TF: 70-71 | | 2021-06-17 | axn | NF | no factor TF: 69-70 | | 2021-05-31 | TJAOI | NF | no factor TF: 68-69 | | 2021-04-15 | Zhang Ruichong | NF-PM1 | B1=1400000, B2=106400000 | | 2018-12-15 | Yxinity | NF | no factor TF: 67-68 | | 2018-12-09 | BloodERazor | NF | no factor TF: 67-68 | | 2017-12-27 | Yxinity | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-06 | snme2pm1 | NF | no factor TF: 65-66 | | 2013-11-13 | David Campeau | NF | no factor TF: 64-65 | | 2013-10-30 | Jayder | NF | no factor TF: 63-64 | | 2013-08-28 | Squeeky_Squirrel | NF-PM1 | B1=130000, B2=2567500, E=6 | | 2011-08-26 | USAFSS | NF-PM1 | B1=45000, B2=641250, E=6 | | 2011-05-28 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-11-19 | Grant McCracken | NF | no factor TF: 61-62 | | 2009-08-04 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2001-12-01 | David Campeau | NF | no factor TF: 1-61 | | 1999-10-29 | -anonymous- | C-LL | 13429C61631E9621 |
|
