| 3320873 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 270 TF target 264 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 219 / 280 |
Estimated T-Level: 23.9 ⓘ TF below 2^74 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | 1998-02-08 | Andrew Osterburg | 7DC662BB077B6DBF | 0 | Windows,Prime95,v15,(aka WR1) | | Factored | 1999-07-04 | Galena High School | 7DC662BB077B6DBF | 901977 | Windows,Prime95,v18,(aka WU1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-02-02 | fordobr | 1F7225E661A4F4A4 | 1 | 2531774 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-02-02 | EthanD | CERT | Proof certified good | | 2025-02-02 | fordobr | C-PRP | M3320873/179671660161045022410161 : 1F7225E661A4F4A4 Proof Certified Good
Proof Power: 7
| | 2025-02-02 | fordobr | F-ECM | Factor: 179671660161045022410161 / ECM curve 13, B1=136968, B2=275660385, Edwards Sigma=1749892484015674 | | 2023-05-08 | Sid & Andy | NF-PM1 | B1=6300000, B2=22713580890 | | 2023-02-13 | Joss | NF-PM1 | B1=1000000, B2=809541810 | | 2022-12-01 | Joss | NF-PM1 | B1=1000000, B2=284427990 | | 2022-09-16 | TJAOI | NF | no factor TF: 69-70 | | 2021-08-10 | MadPoo 🙂 | NF | no factor TF: 68-69 | | 2020-01-09 | BigBrother | NF-PM1 | B1=3000000, B2=90000000 | | 2018-11-26 | TJAOI | NF | no factor TF: 67-68 | | 2017-02-26 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-04-16 | USAFSS | NF-PM1 | B1=225000, B2=6581250, E=12 | | 2016-03-02 | ramgeis | NF | no factor TF: 65-66 | | 2016-02-23 | Mark Rose | NF | no factor TF: 62-63 | | 2015-02-07 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-02-07 | VictordeHollander | NF | no factor TF: 63-64 | | 2012-08-25 | GrunwalderGIMP | NF | no factor TF: 1-63 | | 2011-09-10 | markr | NF | no factor TF: 61-62 | | 2010-09-16 | markr | NF-PM1 | B1=95000, B2=2042500, E=6 | | 2009-08-14 | Carsten Kossendey | NF-PM1 | B1=15000, B2=195000 | | 2009-03-31 | S485122 | NF | no factor TF: 60-61 | | 1999-07-04 | cmorton | C-LL | 7DC662BB077B6DBF | | 1998-02-08 | -anonymous- | C-LL | 7DC662BB077B6DBF | | 1998-01-21 | -anonymous- | NF | no factor TF: 1-60 |
|
