| 4531409 | 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 | 1998-10-29 | Bill Delveaux | 38DF298DE8BCEB78 | 0 | Windows,Prime95,v16,NT service,(aka WS5) | | Factored | 2000-04-05 | Michael J. Kilfoyle | 38DF298DE8BCEB78 | 450772 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2018-05-18 | Gabriel Lignelli | E158B1F0EB0ED426 | 1 | 3267933 | 5 | 3 | | Verified | PRP without proof (not generated) | 2018-05-23 | storm5510 | E158B1F0EB0ED426 | 1 | 2866091 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2018-05-23 | storm5510 | C-PRP | M4531409/74482269048293950279 : E158B1F0EB0ED426 | | 2018-05-18 | Gabriel Lignelli | C-PRP | M4531409/74482269048293950279 : E158B1F0EB0ED426 | | 2018-05-15 | ramgeis | F | Factor: 74482269048293950279 / TF: 66-67* | | 2017-01-31 | 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 | | 2014-11-11 | lycorn | NF | no factor TF: 64-65 | | 2014-11-10 | Jayder | NF | no factor TF: 63-64 | | 2011-12-28 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2010-09-10 | markr | NF | no factor TF: 61-62 | | 2010-08-19 | markr | NF-PM1 | B1=90000, B2=2002500, E=6 | | 2000-04-05 | -anonymous- | C-LL | 38DF298DE8BCEB78 | | 1998-10-29 | -anonymous- | C-LL | 38DF298DE8BCEB78 | | 1998-09-27 | -anonymous- | NF | no factor TF: 1-61 |
|
