| 2852609 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 270 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 228 / 280 |
Estimated T-Level: 24.1 ⓘ TF below 2^75 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Robert Friberg | 6DE10FE4E54178A9 | 0 | Windows,Prime95,v14,(aka WQ1) | | Factored | 1999-05-23 | C. Cooper / S. Boone | 6DE10FE4E54178A9 | 1489309 | Linux 32-bit,Prime95,v18,(aka WU2) | | Factored | 2018-09-17 | kkmrkkblmbrbk | 6DE10FE4E54178A9 | 224079 | 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 | 2025-03-23 | fordobr | 38E70B56981AC854 | 1 | 2375015 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2025-03-23 | Stephan Grupp | CERT | Proof certified good | | 2025-03-23 | fordobr | C-PRP | M2852609/531360309839871080447110369 : 38E70B56981AC854 Proof Certified Good
Proof Power: 7
| | 2025-03-23 | fordobr | F-ECM | Factor: 531360309839871080447110369 / ECM curve 5, B1=172980, B2=459434880, Edwards Sigma=66011947875064 | | 2023-08-11 | TJAOI | NF | no factor TF: 69-70 | | 2022-06-07 | mikr | NF-PM1 | B1=10000000, B2=19232945550 | | 2021-06-28 | TJAOI | NF | no factor TF: 68-69 | | 2019-10-28 | masser | NF-PM1 | B1=2860000, B2=28600000, E=12 | | 2019-01-07 | chuenkit | NF | no factor TF: 67-68 | | 2018-09-17 | kkmrkkblmbrbk | C-LL | 6DE10FE4E54178A9 | | 2018-08-30 | Joss | NF-PM1 | B1=868008, B2=2604024, E=6 | | 2018-08-27 | Joss | NF-PM1 | B1=868008, B2=1736016, E=6 | | 2018-01-24 | Joss | NF-PM1 | B1=673340 | | 2017-11-12 | Gordon Spence | NF | no factor TF: 66-67 | | 2017-04-01 | Joss | NF-PM1 | B1=324721, B2=3247210, E=6 | | 2017-01-10 | Joss | NF-PM1 | B1=225501 | | 2016-12-19 | Joss | NF-PM1 | B1=187918 | | 2016-08-23 | Joss | NF-PM1 | B1=156599, B2=4772500, E=6 | | 2016-02-23 | Mark Rose | NF | no factor TF: 1-60 | | 2016-02-16 | ramgeis | NF | no factor TF: 65-66 | | 2015-04-21 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-04-21 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-01-10 | dbaugh | NF | no factor TF: 62-63 | | 2012-01-30 | markr | NF | no factor TF: 61-62 | | 2011-02-08 | markr | NF-PM1 | B1=115000, B2=2386250, E=6 | | 2011-01-26 | Joss | NF-PM1 | B1=50000 | | 2011-01-03 | Joss | NF-PM1 | B1=30000 | | 2010-12-22 | Joss | NF-PM1 | B1=20000 | | 2009-02-13 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-12-13 | Team Prime Rib | NF-PM1 | B1=15000, B2=236250 | | 2003-11-28 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-05-23 | curtisc | C-LL | 6DE10FE4E54178A9 |
|
