| 4910327 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 84 / 280 |
Estimated T-Level: 21.5 ⓘ TF below 2^66 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-06-01 | Michael B. Clark | F8FAA8F10E4DB47A | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 2000-03-27 | Robert Holland | F8FAA8F10E4DB47A | 3721106 | Windows,Prime95,v19,NT service,(aka WV5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-09 | Andrey Dobrynin | 6A9C64BBF5DE68CF | 1 | 3619437 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-09 | lycorn | CERT | Proof certified good | | 2025-03-09 | Andrey Dobrynin | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-09 | Andrey Dobrynin | F-ECM | Factor: 16304597280251229716953 / ECM curve 24, B1=50000, B2=45039225, Edwards Sigma=81931811935613 | | 2023-04-11 | Sid & Andy | NF-PM1 | B1=4000000, B2=10397372700 | | 2021-04-25 | -anonymous- | NF | no factor TF: 71-72 | | 2021-04-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-04-23 | -anonymous- | NF | no factor TF: 69-70 | | 2021-03-22 | TJAOI | NF | no factor TF: 68-69 | | 2018-05-23 | ramgeis | NF | no factor TF: 67-68 | | 2017-10-29 | Yxinity | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-61 | | 2015-07-24 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-29 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-29 | VictordeHollander | NF | no factor TF: 63-64 | | 2014-09-23 | mikr | NF-PM1 | B1=1200000, B2=39750000, E=12 | | 2011-09-03 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-07-12 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2010-04-08 | markr | NF | no factor TF: 61-62 | | 2009-09-03 | Carsten Kossendey | NF-PM1 | B1=30000, B2=435000 | | 2000-03-27 | -anonymous- | C-LL | F8FAA8F10E4DB47A | | 1998-06-01 | planetmike | C-LL | F8FAA8F10E4DB47A |
|
