| 5378227 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 64 / 280 |
Estimated T-Level: 21.1 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-08-16 | Dr James Denholm-Price | 98C20F7706CEE541 | 0 | Windows,Prime95,v16,(aka WS1) | | Factored | 2000-10-15 | Robert Babilon | 98C20F7706CEE541 | 4531215 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-14 | pilotpsk | 1BED0D91F713F662 | 1 | 429034 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-14 | L8426936 | CERT | Proof certified good | | 2025-03-14 | pilotpsk | C-PRP | M5378227/25446979889222407246729639 : 1BED0D91F713F662 Proof Certified Good
Proof Power: 7
| | 2025-03-06 | fordobr | F-ECM | Factor: 25446979889222407246729639 / ECM curve 26, B1=50000, B2=86479575, Edwards Sigma=1513708262458240 | | 2024-04-30 | kracker | NF | no factor TF: 71-72 | | 2022-08-15 | Sid & Andy | NF-PM1 | B1=4000000, B2=10296725670 | | 2022-02-25 | mikr | NF | no factor TF: 70-71 | | 2021-09-02 | TJAOI | NF | no factor TF: 69-70 | | 2020-08-31 | TJAOI | NF | no factor TF: 68-69 | | 2019-07-19 | USAFSS | NF-PM1 | B1=320000, B2=9520000 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-12 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-19 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-24 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-24 | VictordeHollander | NF | no factor TF: 63-64 | | 2010-05-10 | Squeeky_Squirrel | NF-PM1 | B1=60000, B2=1020000, E=6 | | 2009-05-19 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-10-15 | -anonymous- | C-LL | 98C20F7706CEE541 | | 2000-09-08 | -anonymous- | NF-PM1 | B1=20000, B2=160000 | | 1998-08-16 | James D-P | C-LL | 98C20F7706CEE541 | | 1998-08-16 | -anonymous- | NF | no factor TF: 1-62 | | 1998-03-17 | -anonymous- | NF | no factor TF: 1-62 |
|
