| 4450373 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 75 / 280 |
Estimated T-Level: 21.3 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-03-03 | Jason Gayman | 1716E0C9DEB4445E | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 1999-11-17 | David Linton | 1716E0C9DEB4445E | 131645 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-10 | Andrey Dobrynin | 065EA5E8F5131E62 | 1 | 3057274 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-10 | raucourt | CERT | Proof certified good | | 2025-03-10 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-10 | Andrey Dobrynin | F-ECM | Factor: 33338632779914656991561 / ECM curve 3, B1=72884, B2=88280115, Edwards Sigma=7633145118909565 | | 2024-11-17 | TheJudger | NF | no factor TF: 72-73 | | 2024-11-17 | TheJudger | NF | no factor TF: 71-72 | | 2023-01-06 | Sid & Andy | NF-PM1 | B1=6400000, B2=10265951850 | | 2021-08-22 | SRBase | NF | no factor TF: 70-71 | | 2021-08-17 | SRBase | NF | no factor TF: 69-70 | | 2021-07-30 | Joss | NF | no factor TF: 68-69 | | 2018-06-29 | ramgeis | NF | no factor TF: 67-68 | | 2018-06-29 | ramgeis | NF | no factor TF: 66-67 | | 2016-11-27 | mikr | NF-PM1 | B1=1800000, B2=68000000, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-24 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-09-14 | monst | NF | no factor TF: 64-65 | | 2014-09-13 | Jayder | NF | no factor TF: 63-64 | | 2012-05-08 | Squeeky_Squirrel | NF-PM1 | B1=135000, B2=2733750, E=6 | | 2012-02-03 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-10-15 | markr | NF | no factor TF: 61-62 | | 2009-07-20 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2001-12-01 | David Campeau | NF | no factor TF: 1-61 | | 1999-11-17 | -anonymous- | C-LL | 1716E0C9DEB4445E | | 1998-03-03 | -anonymous- | C-LL | 1716E0C9DEB4445E |
|
