| 2915831 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 270 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 71 / 640 |
Estimated T-Level: 25.6 ⓘ TF below 2^80 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Carlos Miguel Andre de Oliveira | A8FB2429A7303B94 | 0 | Linux 32-bit,Prime95,v14,(aka WQ2) | | Factored | 1999-05-02 | James Arnold | A8FB2429A7303B94 | 1729652 | Windows,Prime95,v18,NT service,(aka WU5) | | Factored | 2018-10-04 | kkmrkkblmbrbk | A8FB2429A7303B94 | 759739 | Windows 64-bit,Prime95,v29.4,build 5 |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-01-11 | fordobr | 885FCC2A4A9DD8F6 | 1 | 421478 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-01-11 | Pappy | CERT | Proof certified good | | 2025-01-11 | fordobr | C-PRP | M2915831/3670777075673006562257537 : 885FCC2A4A9DD8F6 Proof Certified Good
Proof Power: 7
| | 2025-01-11 | fordobr | F-ECM | Factor: 3670777075673006562257537 / ECM curve 25, B1=166351, B2=367552185, Edwards Sigma=377701192613283 | | 2023-10-24 | Joss | NF-PM1 | B1=10000000, B2=10019691990 | | 2023-10-18 | Joss | NF-PM1 | B1=10000000, B2=1781109330 | | 2023-09-22 | Joss | NF-PM1 | B1=10000000, B2=847615230 | | 2023-09-22 | Joss | NF-PM1 | B1=10000000, B2=297802890 | | 2023-09-16 | Joss | NF-PM1 | B1=1000000, B2=5990024040 | | 2023-05-26 | Joss | NF-PM1 | B1=1000000, B2=2878315440 | | 2023-05-26 | TJAOI | NF | no factor TF: 69-70 | | 2021-05-31 | TJAOI | NF | no factor TF: 68-69 | | 2020-03-30 | masser | NF-PM1 | B1=5000000, B2=200000000, E=12 | | 2018-12-18 | chuenkit | NF | no factor TF: 67-68 | | 2018-10-04 | kkmrkkblmbrbk | C-LL | A8FB2429A7303B94 | | 2017-11-19 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2016-02-22 | ramgeis | NF | no factor TF: 65-66 | | 2015-04-25 | VictordeHollander | NF-PM1 | B1=1000000, B2=20000000, E=12 | | 2015-04-25 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-04-25 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-01-10 | dbaugh | NF | no factor TF: 62-63 | | 2011-12-21 | Grant McCracken | NF | no factor TF: 61-62 | | 2011-01-25 | markr | NF-PM1 | B1=105000, B2=2283750, E=6 | | 2010-12-24 | Joss | NF-PM1 | B1=20000 | | 2009-07-03 | Carsten Kossendey | NF-PM1 | B1=15000, B2=168750 | | 2009-02-13 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-12-02 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-05-02 | -anonymous- | C-LL | A8FB2429A7303B94 |
|
