| 4190057 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 131 / 280 |
Estimated T-Level: 22.3 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Rhoads Hollowell | AB5099681B7ED448 | 0 | Mac,John Sweeney,v1.4,(aka J3) | | Factored | 1999-10-15 | Marco Tagliatti | AB5099681B7ED448 | 399549 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-20 | Andrey Dobrynin | 0F053A56D7E0EA82 | 1 | 771721 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-20 | Massimo Cappelli (ik5pwa) | CERT | Proof certified good | | 2025-02-20 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-02-20 | Andrey Dobrynin | F-ECM | Factor: 378804293849823674925119 / ECM curve 16, B1=82848, B2=117709515, Edwards Sigma=1713535627324576 | | 2024-11-28 | Andrew B | NF | no factor TF: 71-72 | | 2022-12-11 | DRobinsonPE | NF-PM1 | B1=6200000, B2=33322740360 | | 2022-06-01 | mikr | NF | no factor TF: 70-71 | | 2021-06-15 | axn | NF | no factor TF: 69-70 | | 2021-06-07 | 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 | | 2017-12-23 | 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 | | 2013-11-16 | David Campeau | NF | no factor TF: 64-65 | | 2013-10-26 | Jayder | NF | no factor TF: 63-64 | | 2013-08-23 | 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 | | 2010-12-15 | Grant McCracken | NF | no factor TF: 61-62 | | 2009-08-03 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 1999-10-15 | -anonymous- | C-LL | AB5099681B7ED448 | | 1999-01-10 | -anonymous- | NF | no factor TF: 1-61 |
|
