| 5337947 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 49 / 280 |
Estimated T-Level: 20.9 ⓘ TF below 2^64 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-07-21 | Joel Armengaud | C5F1019438F6D73D | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-07-25 | Stefano Marchesini | C5F1019438F6D73D | 4110589 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-05-05 | atk80230 | 93CA5F15FA897633 | 1 | 2894910 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-05-05 | EthanD | CERT | Proof certified good | | 2025-05-05 | atk80230 | C-PRP | M5337947/512206350468202488454039967 : 93CA5F15FA897633 Proof Certified Good
Proof Power: 7
| | 2025-02-28 | fordobr | F-ECM | Factor: 512206350468202488454039967 / ECM curve 21, B1=50000, B2=60054225, Edwards Sigma=1499943117197304 | | 2024-06-18 | Naegi Makoto | NF | no factor TF: 71-72 | | 2022-09-15 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-14 | mikr | NF | no factor TF: 70-71 | | 2021-09-28 | TJAOI | NF | no factor TF: 69-70 | | 2020-08-17 | TJAOI | NF | no factor TF: 68-69 | | 2019-06-29 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2019-02-20 | USAFSS | NF-PM1 | B1=320000, B2=9520000 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-06 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-16 | 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 | | 2010-09-17 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=960000, E=6 | | 2009-08-25 | Carsten Kossendey | NF-PM1 | B1=25000, B2=343750 | | 2009-05-27 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-07-25 | -anonymous- | C-LL | C5F1019438F6D73D | | 1998-07-21 | Joel Armengaud | C-LL | C5F1019438F6D73D | | 1998-03-09 | -anonymous- | NF | no factor TF: 1-62 |
|
