| 4428467 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 178 / 280 |
Estimated T-Level: 23.2 ⓘ TF below 2^72 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-02-24 | John D. Forinash | 88390C62D8DB37E6 | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 2000-05-05 | BowWow | 88390C62D8DB37E6 | 1168617 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-28 | fordobr | 22E402E130F36B2D | 1 | 2507157 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-28 | carel van der westhuizen | CERT | Proof certified good | | 2025-02-28 | fordobr | C-PRP | M4428467/2185682916339035670511851959 : 22E402E130F36B2D Proof Certified Good
Proof Power: 7
| | 2025-02-28 | fordobr | F-ECM | Factor: 2185682916339035670511851959 / ECM curve 40, B1=70688, B2=88280115, Edwards Sigma=3474483796235192 | | 2024-11-17 | TheJudger | NF | no factor TF: 72-73 | | 2024-11-17 | TheJudger | NF | no factor TF: 71-72 | | 2024-07-23 | Jason Lynch | NF-PM1 | B1=19405000, B2=313652088750 | | 2021-08-19 | axn | NF-PM1 | B1=10000000, B2=500000000 | | 2021-08-10 | SRBase | NF | no factor TF: 70-71 | | 2021-07-16 | axn | NF | no factor TF: 69-70 | | 2021-06-07 | TJAOI | NF | no factor TF: 68-69 | | 2021-04-24 | Architects Cubed | NF-PM1 | B1=221000, B2=13447000 | | 2018-06-26 | ramgeis | NF | no factor TF: 67-68 | | 2018-05-17 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-22 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-08-30 | lycorn | NF | no factor TF: 64-65 | | 2014-08-30 | Jayder | NF | no factor TF: 63-64 | | 2012-10-04 | Squeeky_Squirrel | NF-PM1 | B1=290000, B2=7395000, E=12 | | 2012-01-15 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-10-22 | markr | NF | no factor TF: 61-62 | | 2009-07-19 | Carsten Kossendey | NF-PM1 | B1=25000, B2=356250 | | 2001-12-22 | David Campeau | NF | no factor TF: 1-61 | | 2000-05-05 | -anonymous- | C-LL | 88390C62D8DB37E6 | | 1998-02-24 | -anonymous- | C-LL | 88390C62D8DB37E6 |
|
