| 5388289 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 67 / 280 |
Estimated T-Level: 21.2 ⓘ TF below 2^65 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-10-04 | INTERSHOP Communications | C24C95EE392A0454 | 0 | Windows,Prime95,v16,NT service,(aka WS5) | | Factored | 2001-06-23 | Peter Evans | C24C95EE392A0454 | 5231013 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-15 | Ashton | 68A24B4BF3D0DA2B | 1 | 4380971 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-15 | Mark Filipski | CERT | Proof certified good | | 2025-03-15 | Ashton | C-PRP | M5388289/4714230572445882264323146408903 : 68A24B4BF3D0DA2B Proof Certified Good
Proof Power: 7
| | 2025-03-08 | fordobr | F-ECM | Factor: 4714230572445882264323146408903 / ECM curve 31, B1=50000, B2=45039225, Edwards Sigma=3143383130693297 | | 2024-03-29 | Random GPUs | NF | no factor TF: 71-72 | | 2022-09-14 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-28 | mikr | NF | no factor TF: 70-71 | | 2021-12-08 | Yxinity | NF | no factor TF: 69-70 | | 2020-08-24 | TJAOI | NF | no factor TF: 68-69 | | 2019-07-21 | USAFSS | NF-PM1 | B1=325000, B2=9587500 | | 2018-06-19 | ramgeis | NF | no factor TF: 67-68 | | 2016-08-13 | Gordon Spence | NF | no factor TF: 66-67 | | 2015-08-20 | 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 | | 2009-11-24 | USAFSS | NF-PM1 | B1=60000, B2=1020000, E=6 | | 2009-05-16 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2001-06-23 | Peter Evans | C-LL | C24C95EE392A0454 | | 2001-06-03 | Peter Evans | NF-PM1 | B1=20000, B2=20000 | | 2000-07-25 | -anonymous- | C-LL | 8A9CC1921C410A__ | | 1998-10-04 | netconx | C-LL | C24C95EE392A0454 | | 1998-08-24 | -anonymous- | NF | no factor TF: 1-62 |
|
