| 2573209 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 156 / 280 |
Estimated T-Level: 22.8 ⓘ TF below 2^71 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | Andy Warner | 50289C0E728FC666 | 0 | Windows,Prime95,v13,(aka WP1) | | Factored | 1999-04-23 | Steven Carlson | 50289C0E728FC666 | 2381119 | Windows,Prime95,v17,(aka WT1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | PRP without proof (not generated) | 2017-10-15 | Oliver Kruse | 109B29A6178CAD6B | 1 | 2157199 | 5 | 3 | | Verified | PRP without proof (not generated) | 2017-12-01 | storm5510 | 109B29A6178CAD6B | 1 | 1481843 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-01-28 | USAFSS | NF-PM1 | B1=360000, B2=340942140 | | 2017-12-01 | storm5510 | C-PRP | M2573209/3384797832879628880311 : 109B29A6178CAD6B | | 2017-10-15 | Oliver Kruse | C-PRP | M2573209/3384797832879628880311 : 109B29A6178CAD6B | | 2016-03-13 | Jason U | F-ECM | Factor: 3384797832879628880311 | | 2016-02-23 | Mark Rose | NF | no factor TF: 59-60 | | 2015-11-09 | omylist | NF | no factor TF: 65-66 | | 2015-02-23 | VictordeHollander | NF | no factor TF: 64-65 | | 2015-02-23 | VictordeHollander | NF | no factor TF: 63-64 | | 2013-01-14 | dbaugh | NF | no factor TF: 62-63 | | 2012-06-19 | Sebastian Hornbostel | NF | no factor TF: 61-62 | | 2011-04-18 | James Heinrich | NF-PM1 | B1=175000, B2=4112500, E=6 | | 2011-01-11 | Joss | NF-PM1 | B1=50000 | | 2010-12-21 | Joss | NF-PM1 | B1=20000 | | 2009-01-31 | Sturle Sunde | NF | no factor TF: 60-61 | | 2003-11-08 | Team Prime Rib | NF-PM1 | B1=15000, B2=202500 | | 2003-10-31 | -anonymous- | NF-PM1 | B1=2048, B2=204800 | | 1999-04-23 | -anonymous- | C-LL | 50289C0E728FC666 | | 1999-03-26 | -anonymous- | NF | no factor TF: 1-59 |
|
