| 4202069 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 265 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 137 / 280 |
Estimated T-Level: 22.4 ⓘ TF below 2^70 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-05 | Al Lovrich | FC7C13540565BA7F | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 1999-10-15 | Brad Harrell | FC7C13540565BA7F | 2395253 | Linux 32-bit,Prime95,v18,(aka WU2) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-26 | fordobr | FF5A54669898863C | 1 | 2259033 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-26 | Kiselev Vadim | CERT | Proof certified good | | 2025-01-26 | fordobr | C-PRP | M4202069/270336584714749839254399 : FF5A54669898863C Proof Certified Good
Proof Power: 7
| | 2025-01-26 | fordobr | F-ECM | Factor: 270336584714749839254399 / ECM curve 21, B1=77123, B2=117709515, Edwards Sigma=8816298085153487 | | 2022-03-29 | DRobinsonPE | NF-PM1 | B1=6200000, B2=15965654250 | | 2021-04-29 | Dylan Delgado | NF-PM1 | B1=2000000, B2=172000000 | | 2021-01-25 | -anonymous- | NF | no factor TF: 71-72 | | 2021-01-24 | -anonymous- | NF | no factor TF: 70-71 | | 2021-01-23 | -anonymous- | NF | no factor TF: 69-70 | | 2021-01-23 | -anonymous- | NF | no factor TF: 68-69 | | 2018-12-15 | Yxinity | NF | no factor TF: 67-68 | | 2018-11-09 | chuenkit | NF | no factor TF: 67-68 | | 2017-12-27 | Yxinity | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-06-07 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-01-03 | Squeeky_Squirrel | NF-PM1 | B1=145000, B2=3371250, E=6 | | 2013-11-28 | David Campeau | NF | no factor TF: 64-65 | | 2013-11-04 | Jayder | NF | no factor TF: 63-64 | | 2012-01-19 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-12-03 | Squeeky_Squirrel | NF-PM1 | B1=75000, B2=1368750, E=6 | | 2011-08-06 | Squeeky_Squirrel | NF-PM1 | B1=50000, B2=737500, E=6 | | 2011-01-29 | markr | NF | no factor TF: 61-62 | | 2009-07-28 | Carsten Kossendey | NF-PM1 | B1=25000, B2=337500 | | 1999-10-15 | -anonymous- | C-LL | FC7C13540565BA7F | | 1998-07-05 | -anonymous- | C-LL | FC7C13540565BA7F | | 1998-06-01 | MadPoo 🙂 | NF | no factor TF: 1-61 |
|
