| 4589407 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 108 / 280 |
Estimated T-Level: 21.9 ⓘ TF below 2^68 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-06-28 | Rick Schieche | 477591FF65000C7F | 0 | Windows,Prime95,v16,NT service,(aka WS5) | | Factored | 2002-02-24 | Shane Sanford | 477591FF65000C7F | 4287741 | Windows,Prime95,v21,(aka WX1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-26 | fordobr | 049504B03F5FA843 | 1 | 492122 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-26 | raucourt | CERT | Proof certified good | | 2025-03-26 | fordobr | C-PRP | M4589407/21991196825890353070871 : 049504B03F5FA843 Proof Certified Good
Proof Power: 7
| | 2025-03-26 | fordobr | F-ECM | Factor: 21991196825890353070871 / ECM curve 16, B1=69679, B2=88280115, Edwards Sigma=354530484951700 | | 2023-02-17 | Sid & Andy | NF-PM1 | B1=4400000, B2=11419636800 | | 2021-02-19 | -anonymous- | NF | no factor TF: 72-73 | | 2021-01-31 | -anonymous- | NF | no factor TF: 71-72 | | 2021-01-26 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-26 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-26 | -anonymous- | NF | no factor TF: 68-69 | | 2018-05-21 | ramgeis | NF | no factor TF: 67-68 | | 2018-05-21 | ramgeis | NF | no factor TF: 66-67 | | 2017-01-26 | Ismo Laitela | NF-PM1 | B1=1988203, B2=61634303, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-03 | snme2pm1 | NF | no factor TF: 65-66 | | 2015-01-06 | lycorn | NF | no factor TF: 64-65 | | 2015-01-05 | Jayder | NF | no factor TF: 63-64 | | 2012-01-08 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-12-05 | Squeeky_Squirrel | NF-PM1 | B1=85000, B2=1572500, E=6 | | 2010-08-15 | markr | NF | no factor TF: 61-62 | | 2002-02-24 | shaneamy | C-LL | 477591FF65000C7F | | 1998-06-28 | -anonymous- | C-LL | 477591FF65000C7F | | 1998-06-01 | MadPoo 🙂 | NF | no factor TF: 1-61 |
|
