| 5340547 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 36 / 280 |
Estimated T-Level: 20.6 ⓘ TF below 2^64 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1999-05-16 | Marc Honey | 53A6D2F90B65FA8A | 3247353 | Windows,Prime95,v18,(aka WU1) | | Factored | 2000-07-17 | Chris | 53A6D2F90B65FA8A | 2286726 | Windows,Prime95,v20,NT service,(aka WW5) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-12 | Stefan G Hoffmann | 409F38F4E86B6785 | 1 | 1370859 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-12 | One Man | CERT | Proof certified good | | 2025-03-12 | Stefan G Hoffmann | C-PRP | M5340547/714536433203358493412537 : 409F38F4E86B6785 Proof Certified Good
Proof Power: 7
| | 2025-02-28 | fordobr | F-ECM | Factor: 714536433203358493412537 / ECM curve 15, B1=50000, B2=45039225, Edwards Sigma=8002008223603266 | | 2024-06-26 | tbusby | NF | no factor TF: 71-72 | | 2022-08-23 | Sid & Andy | NF-PM1 | B1=4000000, B2=10296725670 | | 2022-02-14 | mikr | NF | no factor TF: 70-71 | | 2022-01-26 | Ethan O'Connor | NF | no factor TF: 69-70 | | 2022-01-24 | Gordon Spence | NF | no factor TF: 69-70 | | 2020-08-17 | TJAOI | NF | no factor TF: 68-69 | | 2019-07-03 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-06 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-17 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-25 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-25 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-04-16 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=990000, E=6 | | 2009-05-27 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-07-17 | -anonymous- | C-LL | 53A6D2F90B65FA8A | | 2000-05-31 | -anonymous- | NF-PM1 | B1=20000, B2=160000 | | 1999-05-16 | mhoney | C-LL | 53A6D2F90B65FA8A | | 1998-04-11 | -anonymous- | NF | no factor TF: 1-62 | | 1998-03-09 | -anonymous- | NF | no factor TF: 1-61 |
|
