| 2731187 | 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 | 95 / 640 |
Estimated T-Level: 25.7 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Conrad Curry | 37EC89FB51DE319C | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | | Klaus Kastens | 37EC89FB51DE319C | 0 | Mlucas,Ernst Mayer,v2.5 and later,(aka E2) | | Factored | 2015-11-14 | MadPoo 🙂 | 37EC89FB51DE319C | 2343825 | Windows 64-bit,Prime95,v26,(aka We4) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | Certified Good | 2025-03-01 | fordobr | F860588D30A7F72A | 1 | 324659 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-01 | Ji-Huan Guan | CERT | Proof certified good | | 2025-03-01 | fordobr | C-PRP | M2731187/1258785180748061251464616369 : F860588D30A7F72A Proof Certified Good
Proof Power: 7
| | 2025-03-01 | fordobr | F-ECM | Factor: 1258785180748061251464616369 / ECM curve 35, B1=179402, B2=616193655, Edwards Sigma=5713626192342157 | | 2024-01-03 | Numberwang | NF-PM1 | B1=270000, B2=1283160060 | | 2023-12-19 | TJAOI | NF | no factor TF: 69-70 | | 2023-03-09 | Architects Cubed | NF-PM1 | B1=5000000, B2=8681331750 | | 2022-12-13 | Joss | NF-PM1 | B1=1000000, B2=449428980 | | 2021-11-05 | Aaron Haviland | NF-PM1 | B1=2000000, B2=40800000, E=12 | | 2021-08-02 | TJAOI | NF | no factor TF: 68-69 | | 2019-02-13 | chuenkit | NF | no factor TF: 67-68 | | 2018-07-04 | Joss | NF-PM1 | B1=600000, B2=6000000, E=6 | | 2017-10-05 | Gordon Spence | NF | no factor TF: 66-67 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2016-02-02 | ramgeis | NF | no factor TF: 65-66 | | 2015-11-14 | MadPoo 🙂 | C-LL | 37EC89FB51DE319C | | 2015-04-13 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-04-13 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-01-10 | dbaugh | NF | no factor TF: 62-63 | | 2012-04-12 | markr | NF | no factor TF: 61-62 | | 2011-02-27 | James Heinrich | NF-PM1 | B1=300000, B2=8000000, E=12 | | 2011-01-19 | Joss | NF-PM1 | B1=50000 | | 2010-12-28 | Joss | NF-PM1 | B1=30000 | | 2010-12-19 | Joss | NF-PM1 | B1=20000 | | 2009-01-30 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-28 | Team Prime Rib | NF-PM1 | B1=15000, B2=225000 | | 2003-11-16 | -anonymous- | NF-PM1 | B1=2048, B2=204800 |
|
