| 4187069 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 118 / 280 |
Estimated T-Level: 22.1 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David A McGough | F09395E58FA08E2E | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 2000-01-12 | Toby McLaughlin | F09395E58FA08E2E | 2225403 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-07 | Andrey Dobrynin | 2D9D07DE83EF0EB3 | 1 | 1317871 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-07 | JG48 | CERT | Proof certified good | | 2025-01-07 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-01-07 | Andrey Dobrynin | F-ECM | Factor: 1141783427733871747544351 / ECM curve 16, B1=74745, B2=117709515, Edwards Sigma=5401325291174023 | | 2024-12-01 | bayanne | NF | no factor TF: 71-72 | | 2022-12-16 | DRobinsonPE | NF-PM1 | B1=6200000, B2=32702012070 | | 2022-05-31 | mikr | NF | no factor TF: 70-71 | | 2021-06-20 | axn | NF | no factor TF: 69-70 | | 2021-06-14 | TJAOI | NF | no factor TF: 68-69 | | 2021-04-04 | Dylan Delgado | NF-PM1 | B1=400000, B2=12000000, E=12 | | 2018-12-07 | Yxinity | NF | no factor TF: 67-68 | | 2017-12-22 | 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 | | 2013-11-23 | David Campeau | NF | no factor TF: 64-65 | | 2013-10-24 | Jayder | NF | no factor TF: 63-64 | | 2013-08-21 | Squeeky_Squirrel | NF-PM1 | B1=125000, B2=2406250, E=6 | | 2011-08-24 | USAFSS | NF-PM1 | B1=45000, B2=630000, E=6 | | 2011-07-01 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-12-23 | Grant McCracken | NF | no factor TF: 61-62 | | 2009-08-04 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2001-08-26 | David Campeau | NF | no factor TF: 1-61 | | 2000-01-12 | -anonymous- | C-LL | F09395E58FA08E2E |
|
