| 4278383 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 273 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 167 / 280 |
Estimated T-Level: 23.0 ⓘ TF below 2^71 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Stephen Wood | 9725BE5418D6B1F3 | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 2000-02-09 | Dwight Leu | 9725BE5418D6B1F3 | 2756940 | Linux 32-bit,Prime95,v19,(aka WV2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-12 | Ruslan Borisov | 1A6CE8707F9E5785 | 1 | 4223890 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-12 | Xyzzy | CERT | Proof certified good | | 2025-01-12 | Ruslan Borisov | C-PRP | M4278383/239111916208430678190962089 : 1A6CE8707F9E5785 Proof Certified Good
Proof Power: 7
| | 2025-01-12 | Ruslan Borisov | F-ECM | Factor: 239111916208430678190962089 / ECM curve 45, B1=70904, B2=38910690, Edwards Sigma=6174630192561947 | | 2024-11-17 | TheJudger | NF | no factor TF: 72-73 | | 2024-11-17 | TheJudger | NF | no factor TF: 71-72 | | 2022-06-15 | DRobinsonPE | NF-PM1 | B1=6200000, B2=28070062020 | | 2021-01-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-22 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-22 | -anonymous- | NF | no factor TF: 68-69 | | 2018-11-16 | chuenkit | NF | no factor TF: 67-68 | | 2018-04-26 | chuenkit | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-07-22 | David Campeau | NF-PM1 | B1=1145000, B2=30915000, E=12 | | 2015-06-12 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-08-15 | -anonymous- | NF-PM1 | B1=65002 | | 2014-05-31 | lycorn | NF | no factor TF: 64-65 | | 2014-05-05 | Jayder | NF | no factor TF: 63-64 | | 2012-01-31 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-09-01 | Squeeky_Squirrel | NF-PM1 | B1=50000, B2=762500, E=6 | | 2010-12-26 | markr | NF | no factor TF: 61-62 | | 2009-08-05 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 2001-12-22 | David Campeau | NF | no factor TF: 1-61 | | 2000-02-09 | dwight | C-LL | 9725BE5418D6B1F3 |
|
