| 269987 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 244 |
| Factored | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 640 / 640 | | 35 | 1000000 | 1566 / 1566 | | 40 | 3000000 | 527 / 4588 |
Estimated T-Level: 35.6 ⓘ TF below 2^113 is very unlikely to find new factors due to ECM effort. |
| LL | | Status | Date | User | Residue | Shift | Software |
|---|
| Factored | | David Slowinski | 13DB | 0 | Cray,Slowinski,(aka D5) | | Factored | | Unknown | 13DB | 0 | Unknown,(aka U) | | Factored | | Brian J. Beesley | CE8A7722949C93DB | 0 | Glucas pre-shift counts,(aka G2) | | Factored | | Eivind Triel | CE8A7722949C93DB | 178407 | Windows,Prime95,v24 final,(aka Wc1) | | Factored | 2001-11-10 | Brian J. Beesley | CE8A7722949C93DB | 188807 | Windows,Prime95,v20,(aka WW1) |
|
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Verified | No proof (small exponent) | 2019-01-29 | ATH | 43C2352EA6EA12EF | 1 | 228522 | 5 | 3 | | Verified | No proof (small exponent) | 2019-01-30 | _p95holder_ | 43C2352EA6EA12EF | 1 | 165640 | 5 | 3 | | Verified | No proof (small exponent) | 2019-01-30 | kkmrkkblmbrbk | 43C2352EA6EA12EF | 1 | 192172 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2022-03-07 | LordJulius | NF | no factor TF: 54-55 | | 2019-01-30 | kkmrkkblmbrbk | C-PRP | M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF | | 2019-01-30 | _p95holder_ | C-PRP | M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF | | 2019-01-29 | ATH | C-PRP | M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF | | 2019-01-29 | kkmrkkblmbrbk | F-ECM | Factor: / ECM curve 428, B1=1000000, B2=100000000, Montgomery Sigma=6144280486019790 | | 2018-03-22 | Gordon Spence | NF | no factor TF: 64-65 | | 2016-02-23 | Mark Rose | NF | no factor TF: 57-58 | | 2015-12-08 | Gordon Spence | NF | no factor TF: 63-64 | | 2015-12-08 | Gordon Spence | NF | no factor TF: 62-63 | | 2015-08-25 | NR | NF | no factor TF: 61-62 | | 2013-08-17 | Markus Tervooren | NF-PM1 | B1=20000000, B2=2000000000, E=12 | | 2013-07-06 | lycorn | NF | no factor TF: 60-61 | | 2012-02-26 | Joss | NF-PM1 | B1=2268093 | | 2011-02-18 | Joss | NF-PM1 | B1=2000000 | | 2009-01-24 | Sturle Sunde | NF | no factor TF: 59-60 | | 2008-12-31 | Sturle Sunde | NF | no factor TF: 58-59 | | 2006-01-15 | Joss | NF-PM1 | B1=269987 | | 2003-11-17 | -anonymous- | NF-PM1 | B1=262144, B2=26214400, E=12 | | 2003-03-16 | -anonymous- | NF-PM1 | B1=131072, B2=13107200, E=30 | | 2002-08-10 | -anonymous- | NF-PM1 | B1=65536, B2=6553600, E=12 | | 2002-06-02 | -anonymous- | NF-PM1 | B1=32768, B2=3276800, E=12 | | 2002-03-31 | -anonymous- | NF | no factor TF: 1-57 | | 2001-11-10 | -anonymous- | C-LL | CE8A7722949C93DB | | 2001-06-23 | -anonymous- | NF-PM1 | B1=100000, B2=10000000 | | 2001-03-25 | -anonymous- | NF-PM1 | B1=100000, B2=4000000 | | 2001-02-25 | -anonymous- | NF | no factor TF: 1-56 | | 2000-04-27 | -anonymous- | NF | no factor TF: 1-54 | | 1999-11-24 | -anonymous- | NF | no factor TF: 52-53 |
|
