| 5380181 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 272 TF target 266 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 50 / 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 | 1998-08-24 | INTERSHOP Communications | B5990D501B428AF9 | 0 | Windows,Prime95,v16,NT service,(aka WS5) | | Factored | 2000-06-23 | James Struble | B5990D501B428AF9 | 867293 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-12 | Team_Inspector | BC7A15BF7C194804 | 1 | 3764085 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-13 | Massimo Cappelli (ik5pwa) | CERT | Proof certified good | | 2025-03-12 | Team_Inspector | C-PRP | Proof Certified Good
Proof Power: 7
| | 2025-03-06 | Andrey Dobrynin | F-ECM | Factor: 21745812628667987482687 / ECM curve 20, B1=50000, B2=86479575, Edwards Sigma=3791525312185171 | | 2024-04-14 | kracker | NF | no factor TF: 71-72 | | 2022-09-18 | Sid & Andy | NF-PM1 | B1=4000000, B2=10285831710 | | 2022-02-26 | mikr | NF | no factor TF: 70-71 | | 2021-12-31 | Yxinity | 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 | | 2015-08-20 | 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 | | 2009-11-20 | USAFSS | NF-PM1 | B1=60000, B2=1020000, E=6 | | 2009-05-19 | GrunwalderGIMP | NF | no factor TF: 62-63 | | 2000-06-23 | -anonymous- | C-LL | B5990D501B428AF9 | | 2000-06-11 | -anonymous- | NF-PM1 | B1=20000, B2=20000 | | 1998-08-24 | netconx | C-LL | B5990D501B428AF9 | | 1998-05-16 | -anonymous- | NF | no factor TF: 1-62 |
|
