| 4574597 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 9 / 280 |
Estimated T-Level: 20.2 ⓘ TF below 2^62 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-06-01 | David M. Smith | 7E8065B27CF5567E | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-11-25 | Stephen Wood | 7E8065B27CF5567E | 2578798 | Linux 32-bit,Prime95,v20,(aka WW2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2018-05-19 | Gabriel Lignelli | 5BC6B89670AE5E85 | 1 | 3713885 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-05-23 | storm5510 | 5BC6B89670AE5E85 | 1 | 1607293 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2018-05-23 | storm5510 | C-PRP | M4574597/137001258685793908361 : 5BC6B89670AE5E85 | | 2018-05-19 | Gabriel Lignelli | C-PRP | M4574597/137001258685793908361 : 5BC6B89670AE5E85 | | 2018-05-15 | ramgeis | F | Factor: 137001258685793908361 / TF: 66-67* | | 2017-04-10 | Ismo Laitela | NF-PM1 | B1=1988203, B2=61634303, E=12 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-02 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-25 | monst | NF | no factor TF: 64-65 | | 2014-12-24 | Jayder | NF | no factor TF: 63-64 | | 2012-01-08 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-08-20 | markr | NF | no factor TF: 61-62 | | 2010-06-24 | markr | NF-PM1 | B1=95000, B2=2018750, E=6 | | 2002-02-24 | David Campeau | NF | no factor TF: 1-61 | | 2000-11-25 | Stephen Wood | C-LL | 7E8065B27CF5567E | | 2000-10-22 | Stephen Wood | NF-PM1 | B1=20000, B2=20000 | | 1999-02-21 | -anonymous- | C-LL | 7E8065B27CF5567E | | 1998-06-01 | -anonymous- | C-LL | 7E8065B27CF5567E | | 1998-05-08 | slaur | NF | no factor TF: 1-60 |
|
