| 4532657 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 133 / 280 |
Estimated T-Level: 22.4 ⓘ TF below 2^69 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-09-20 | Michael Lenz | 1E8BC3B05A402F69 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 1999-12-30 | Lucy_0 | 1E8BC3B05A402F69 | 209272 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-16 | fordobr | 0FBBA1B3CF8D2128 | 1 | 3848252 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-17 | Oliver Kruse | CERT | Proof certified good | | 2025-03-16 | fordobr | C-PRP | M4532657/7827621440385041831807039 : 0FBBA1B3CF8D2128 Proof Certified Good
Proof Power: 7
| | 2025-03-16 | fordobr | F-ECM | Factor: 7827621440385041831807039 / ECM curve 28, B1=69679, B2=60054225, Edwards Sigma=972796666148262 | | 2023-02-07 | Sid & Andy | NF-PM1 | B1=4400000, B2=11419636800 | | 2021-02-13 | -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 | | 2017-02-05 | Ismo Laitela | NF-PM1 | B1=1988203, B2=61634303, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-29 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-11-13 | lycorn | NF | no factor TF: 64-65 | | 2014-11-12 | Jayder | NF | no factor TF: 63-64 | | 2011-12-28 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-09-08 | markr | NF | no factor TF: 61-62 | | 2010-08-18 | markr | NF-PM1 | B1=90000, B2=2002500, E=6 | | 2003-02-24 | BrightSpot | C-LL | 1E8BC3B05A402F69 | | 1999-12-30 | BrightSpot | C-LL | 1E8BC3B05A402F69 | | 1998-09-20 | -anonymous- | C-LL | 1E8BC3B05A402F69 | | 1998-08-30 | -anonymous- | NF | no factor TF: 1-61 |
|
