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Difference between revisions of "Riesel prime 2 21"
m (Karbon moved page Riesel prime 21 to Riesel prime 2 21 without leaving a redirect: renamed) |
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| Line 1: | Line 1: | ||
{{Riesel prime | {{Riesel prime | ||
|Rk=21 | |Rk=21 | ||
| + | |Rb=2 | ||
|RCount=44 | |RCount=44 | ||
|RNash=2103 | |RNash=2103 | ||
| Line 56: | Line 57: | ||
{{HistF|2021-06-27|2959789|Gary Barnes|582053}} | {{HistF|2021-06-27|2959789|Gary Barnes|582053}} | ||
{{HistR|2021-05-10|Gary Barnes|578129}} | {{HistR|2021-05-10|Gary Barnes|578129}} | ||
| + | {{HistC|2021-03-21|1-1000000|Gary Barnes|574248}}, double check, results included | ||
{{HistC|2015-03-01|2890000|Predrag Minovic|396709}} | {{HistC|2015-03-01|2890000|Predrag Minovic|396709}} | ||
{{HistC|2014-10-05|2865000|Predrag Minovic|384394}} | {{HistC|2014-10-05|2865000|Predrag Minovic|384394}} | ||
Revision as of 09:22, 15 July 2021
| Reserved! This sequence is currently reserved by: Gary Barnes |
Current data
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|
Remarks : |
The sequence A002238 in OEIS |
Notes
- ↑ Sophie Germain n=1, Twin n=1
- ↑ Sophie Germain n=2
- ↑ Twin n=7
History
- 2021-06-27: Found n = 2959789, Gary Barnes
- 2021-05-10: Reserved by Gary Barnes
- 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
- 2015-03-01: Checked to n = 2890000, Predrag Minovic
- 2014-10-05: Checked to n = 2865000, Predrag Minovic
- 2013-09-08: Checked to n = 2500000, Predrag Minovic
- 2013-07-09: Checked to n = 2450000, Predrag Minovic
- 2013-01-04: Checked to n = 2220000, Predrag Minovic
- 2012-11-06: Found n = 2160479, Predrag Minovic
- 2012-07-02: Checked to n = 2040000, Predrag Minovic
- 2012-05-04: Checked to n = 1945000, Predrag Minovic
- 2012-03-04: Checked to n = 1910000, Predrag Minovic
- 2012-01-11: Found n = 1872923, Predrag Minovic
- 2011-12-31: Checked to n = 1860000, Predrag Minovic
- 2011-06-04: Checked to n = 1750000, Predrag Minovic
- 2011-04-12: Checked to n = 1590000, Predrag Minovic
- 2011-03-05: Checked to n = 1575000, Predrag Minovic
- 2011-01-13: Checked to n = 1525000, Predrag Minovic
- 2010-10-31: Checked to n = 1500000, Predrag Minovic
- 2010-09-05: Checked to n = 1470000, Predrag Minovic
- 2010-07-18: Checked to n = 1400000, Predrag Minovic
- 2010-05-04: Checked to n = 1320000, Predrag Minovic
- 2010-04-11: Checked to n = 1290000, Predrag Minovic
- 2010-02-11: Checked to n = 1230000, Predrag Minovic
- 2009-08-29: Checked to n = 1200000, Predrag Minovic
- 2009-08-09: Checked to n = 1185000, Predrag Minovic
- 2009-08-02: Found n = 1182083, Predrag Minovic
- 2009-05-31: Checked to n = 1090000, Predrag Minovic
- 2009-02-13: Checked to n = 1075000, Predrag Minovic
- 2008-04-06: Found n = 1452771, Peter Benson
- 2008-03-16: Found n = 1170083, Peter Benson
- 2005-07-14: Found n = 986130, Predrag Minovic
- 2005-03-21: Found n = 999599, Predrag Minovic
- 2004-08-11: Found n = 538657, Predrag Minovic
- 2004-05-07: Found n = 348547, Steven Harvey
- 2004-05-05: Found n = 332523, Steven Harvey
- 2004-04-30: Found n = 297499, Steven Harvey
- 2004-04-17: Found n = 233914, Steven Harvey
- 2004-04-03: Found n = 199219, Steven Harvey
- 1999-07-04: Found n = 71570, Michael J. Graef
- 1999-05-29: Found n = 36227, Michael J. Graef
- 1999-05-29: Found n = 35899, Michael J. Graef
- 1998-08-11: Found n = 29171, Wilfrid Keller
- 1994: Found n = 7777, Harvey Dubner
