| 5263667 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 53 / 280 |
Estimated T-Level: 20.9 ⓘ 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 | Joseph Charrier | FCD725A662FD6A0E | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 2000-08-31 | Robert Mutschler | FCD725A662FD6A0E | 4823311 | Windows,Prime95,v20,(aka WW1) | | Factored | 2000-10-15 | Bill Yan | FCD725A662FD6A0E | 2831394 | Windows,Prime95,v19,(aka WV1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-17 | jeriffee | B7B5D0D9AEA6E045 | 1 | 1753820 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-19 | EthanD | CERT | Proof certified good | | 2025-02-17 | jeriffee | C-PRP | M5263667/18087442139563721873479043209 : B7B5D0D9AEA6E045 Proof Certified Good
Proof Power: 7
| | 2025-02-11 | fordobr | F-ECM | Factor: 18087442139563721873479043209 / ECM curve 23, B1=50000, B2=60054225, Edwards Sigma=2018781584440171 | | 2022-09-07 | Sid & Andy | NF-PM1 | B1=8000000, B2=6410980290 | | 2021-09-28 | SRBase | NF | no factor TF: 71-72 | | 2021-09-03 | SRBase | NF | no factor TF: 70-71 | | 2021-08-18 | SRBase | NF | no factor TF: 69-70 | | 2020-11-23 | TJAOI | NF | no factor TF: 68-69 | | 2020-05-18 | King | NF-PM1 | B1=1000000, B2=22500000 | | 2019-06-23 | Numberwang | NF-PM1 | B1=100000, B2=1575000 | | 2019-06-22 | Numberwang | NF-PM1 | B1=100000, B2=1575000 | | 2018-06-17 | ramgeis | NF | no factor TF: 67-68 | | 2016-06-05 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-13 | snme2pm1 | NF | no factor TF: 65-66 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 64-65 | | 2014-12-22 | VictordeHollander | NF | no factor TF: 63-64 | | 2009-10-14 | USAFSS | NF-PM1 | B1=60000, B2=975000, E=6 | | 2009-06-07 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-10-15 | -anonymous- | C-LL | FCD725A662FD6A0E | | 2000-08-31 | bezahar | C-LL | FCD725A662FD6A0E | | 2000-08-10 | bezahar | NF-PM1 | B1=15000, B2=15000 | | 1998-08-16 | -anonymous- | C-LL | FCD725A662FD6A0E | | 1998-03-03 | -anonymous- | NF | no factor TF: 1-62 |
|
