| 3944987 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 271 TF target 264 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 214 / 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 | 1998-02-19 | chris pilgrim | 53A996C81A12FA73 | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 1999-09-14 | Nicholas Hargrove | 53A996C81A12FA73 | 3351887 | Windows,Prime95,v18,(aka WU1) | | Factored | 2002-06-23 | Brian J. Beesley | 53A996C81A12FA73 | 455266 | Linux 32-bit,Prime95,v22,(aka WY2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-21 | Andrey Dobrynin | 158E37CEA612CAC8 | 1 | 2613936 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-21 | Team_Schaub | CERT | Proof certified good | | 2025-01-21 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-01-21 | Andrey Dobrynin | F-ECM | Factor: 5428344562729836550041907439 / ECM curve 35, B1=92089, B2=117709515, Edwards Sigma=2560739734677558 | | 2023-07-13 | Denial140 | NF-PM1 | B1=20996011, B2=75921755910 | | 2023-02-25 | Denial140 | NF-PM1 | B1=20996011 | | 2022-12-19 | Joss | NF-PM1 | B1=1000000, B2=473947110 | | 2022-10-09 | Joss | NF-PM1 | B1=1000000, B2=119270970 | | 2022-05-12 | Joss | NF-PM1 | B1=500000, B2=119270970 | | 2021-06-03 | -anonymous- | NF | no factor TF: 70-71 | | 2021-05-01 | axn | NF | no factor TF: 69-70 | | 2020-06-26 | TJAOI | NF | no factor TF: 68-69 | | 2018-08-27 | TJAOI | NF | no factor TF: 67-68 | | 2017-02-25 | Joss | NF-PM1 | B1=238464, B2=2384640, E=6 | | 2017-02-12 | Squeeky_Squirrel | NF-PM1 | B1=240000, B2=7500000, E=12 | | 2017-02-04 | Joss | NF-PM1 | B1=198720 | | 2017-01-29 | Joss | NF-PM1 | B1=165600 | | 2017-01-19 | Joss | NF-PM1 | B1=138000 | | 2016-12-11 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2016-02-13 | ramgeis | NF | no factor TF: 65-66 | | 2015-01-14 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-01-14 | VictordeHollander | NF | no factor TF: 63-64 | | 2012-04-04 | Squeeky_Squirrel | NF-PM1 | B1=115000, B2=2185000, E=6 | | 2012-02-20 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-03-18 | Grant McCracken | NF | no factor TF: 61-62 | | 2008-12-29 | Architects Cubed | NF | no factor TF: 60-61 | | 2002-06-23 | -anonymous- | C-LL | 53A996C81A12FA73 | | 2002-06-15 | -anonymous- | NF-PM1 | B1=50000, B2=937500, E=4 | | 1999-09-14 | -anonymous- | C-LL | 53A996C81A12FA73 | | 1998-02-19 | -anonymous- | C-LL | 53A996C81A12FA73 | | 1997-11-21 | Amperio | NF | no factor TF: 1-60 |
|
