| 4449559 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 190 / 280 |
Estimated T-Level: 23.4 ⓘ TF below 2^73 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-06-01 | Nayan Hajratwala | 7472CC12B1E0CE70 | 0 | Windows,Prime95,v15,NT service,(aka WR5) | | Factored | 1999-11-10 | James Struble | 7472CC12B1E0CE70 | 879242 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-31 | Andrey Dobrynin | CD7ADD29034E37A9 | 1 | 3901257 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-31 | gregor_krannich | CERT | Proof certified good | | 2025-03-31 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-31 | Andrey Dobrynin | F-ECM | Factor: 492524321994200830311614449 / ECM curve 36, B1=78404, B2=117709515, Edwards Sigma=4855220943564974 | | 2024-11-17 | TheJudger | NF | no factor TF: 72-73 | | 2024-11-17 | TheJudger | NF | no factor TF: 71-72 | | 2023-02-20 | Sid & Andy | NF-PM1 | B1=6400000, B2=10286095050 | | 2021-08-09 | SRBase | NF | no factor TF: 70-71 | | 2021-07-24 | axn | NF | no factor TF: 69-70 | | 2021-05-03 | TJAOI | 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 | | 2016-11-23 | 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 | | 2014-08-19 | lycorn | NF | no factor TF: 64-65 | | 2014-08-18 | Jayder | NF | no factor TF: 63-64 | | 2012-05-07 | Squeeky_Squirrel | NF-PM1 | B1=135000, B2=2733750, E=6 | | 2012-02-03 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-04-04 | Architects Cubed | NF | no factor TF: 61-62 | | 2009-07-31 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2002-06-09 | David Campeau | NF | no factor TF: 1-61 | | 1999-11-10 | -anonymous- | C-LL | 7472CC12B1E0CE70 | | 1998-06-01 | Nayan Hajratwala | C-LL | 7472CC12B1E0CE70 |
|
