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Difference between revisions of "Riesel prime 2 21"
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(correct date) |
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| Line 2: | Line 2: | ||
|Rk=21 | |Rk=21 | ||
|Rb=2 | |Rb=2 | ||
| − | |RCount= | + | |RCount=46 |
|RNash=2103 | |RNash=2103 | ||
|RMaxn=3500000 | |RMaxn=3500000 | ||
| − | |RDate= | + | |RDate=2025-05-05 |
| − | |RReserved= | + | |RReserved=Karsten Bonath |
|RNlist= | |RNlist= | ||
1;T:ST | 1;T:ST | ||
| Line 52: | Line 52: | ||
2160479;110057 | 2160479;110057 | ||
2959789;132417 | 2959789;132417 | ||
| + | 3745951;140684 | ||
6468257;132834 | 6468257;132834 | ||
|RRemarks=The {{OEIS|l|A002238}} | |RRemarks=The {{OEIS|l|A002238}} | ||
}} | }} | ||
==History== | ==History== | ||
| + | {{HistF|2025-05-05|3745951|Karsten Bonath}} | ||
| + | {{HistR|2025-05-05|Karsten Bonath}} for {{Rn|3500000|6000000}} | ||
{{HistC|2024-05-07|'''Reservation''' dropped|William Byerly}} | {{HistC|2024-05-07|'''Reservation''' dropped|William Byerly}} | ||
{{HistC|2021-10-22|6000000-7000000|Ryan Propper|800335}} | {{HistC|2021-10-22|6000000-7000000|Ryan Propper|800335}} | ||
| Line 88: | Line 91: | ||
{{HistC|2009-08-09|1090000-1140000, 1181000-1185000|Predrag Minovic|M#244368}} | {{HistC|2009-08-09|1090000-1140000, 1181000-1185000|Predrag Minovic|M#244368}} | ||
{{HistF|2009-08-02|1182083|Predrag Minovic|M#243579}} | {{HistF|2009-08-02|1182083|Predrag Minovic|M#243579}} | ||
| − | {{HistC|2009-07-26|1647000-1652069, 2320000-2322000|(unknown)}}, See ranges done at [ | + | {{HistC|2009-07-26|1647000-1652069, 2320000-2322000|(unknown)}}, See ranges done at [http://www.noprimeleftbehind.net/RPSotherRanges.htm RPS other completed ranges]. |
{{HistC|2009-05-31|1075000-1090000|Predrag Minovic|M#233250}} | {{HistC|2009-05-31|1075000-1090000|Predrag Minovic|M#233250}} | ||
{{HistC|2009-02-13|1000000-1075000|Predrag Minovic|M#216263}} | {{HistC|2009-02-13|1000000-1075000|Predrag Minovic|M#216263}} | ||
Latest revision as of 08:08, 6 May 2025
| Reserved! This sequence is currently reserved by: Karsten Bonath |
Current data
|
|
Remarks : |
The sequence A002238 in OEIS |
Notes
- ↑ Sophie Germain n=1, Twin n=1
- ↑ Sophie Germain n=2
- ↑ Twin n=7
History
- 2025-05-05: Found n = 3745951, Karsten Bonath
- 2025-05-05: Reserved by Karsten Bonath for n = 3500000 - 6000000
- 2024-05-07: Reservation dropped, William Byerly
- 2021-10-22: Checked n = 6000000 - 7000000, Ryan Propper
- 2021-10-14: Found n = 6468257, Ryan Propper
- 2021-09-27: Reserved by William Byerly
- 2021-07-24: Checked n = 1000000 - 3500000, Gary Barnes, double-check n = 1000000 - 2890000, released, results included
- 2021-06-27: Found n = 2959789, Gary Barnes
- 2021-05-10: Reserved by Gary Barnes for n = 1000000 - 3500000
- 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double-check, results included
- 2015-03-01: Checked n = 2865000 - 2890000, Predrag Minovic
- 2014-10-05: Checked n = 2500000 - 2865000, Predrag Minovic
- 2013-09-08: Checked n = 2450000 - 2500000, Predrag Minovic
- 2013-07-09: Checked n = 2220000 - 2450000, Predrag Minovic
- 2013-01-04: Checked n = 2040000 - 2220000, Predrag Minovic
- 2012-11-06: Found n = 2160479, Predrag Minovic
- 2012-07-02: Checked n = 1945000 - 1967593, 2035106 - 2040000, Predrag Minovic
- 2012-05-04: Checked n = 1910000 - 1945000, Predrag Minovic
- 2012-03-04: Checked n = 1860000 - 1910000, Predrag Minovic
- 2012-01-11: Found n = 1872923, Predrag Minovic
- 2011-12-31: Checked n = 1750000 - 1860000, Predrag Minovic
- 2011-06-04: Checked n = 1590000 - 1647000, Predrag Minovic, n = 1647000 - 1750000 done previously by Peter Benson & (unknown)
- 2011-04-12: Checked n = 1575000 - 1590000, Predrag Minovic
- 2011-03-05: Checked n = 1525000 - 1575000, Predrag Minovic
- 2011-01-13: Checked n = 1500000 - 1525000, Predrag Minovic
- 2010-10-31: Checked n = 1470000 - 1500000, Predrag Minovic
- 2010-09-05: Checked n = 1400000 - 1430007, 1454797 - 1455138, 1468063 - 1470000, Predrag Minovic
- 2010-07-18: Checked n = 1320000 - 1400000, Predrag Minovic
- 2010-05-04: Checked n = 1290000 - 1320000, Predrag Minovic
- 2010-04-11: Checked n = 1230000 - 1290000, Predrag Minovic
- 2010-02-11: Checked n = 1200000 - 1230000, Predrag Minovic
- 2009-08-29: Checked n = 1185000 - 1200000, Predrag Minovic
- 2009-08-09: Checked n = 1090000 - 1140000, 1181000 - 1185000, Predrag Minovic
- 2009-08-02: Found n = 1182083, Predrag Minovic
- 2009-07-26: Checked n = 1647000 - 1652069, 2320000 - 2322000, (unknown), See ranges done at RPS other completed ranges.
- 2009-05-31: Checked n = 1075000 - 1090000, Predrag Minovic
- 2009-02-13: Checked n = 1000000 - 1075000, Predrag Minovic
- 2009-01-09: Checked n = 950000 - 1032065, 1140002 - 1181063, 1430007 - 1454797, 1455138 - 1468063, 1652069 - 1750090, 1967593 - 2035106, Peter Benson
- 2008-04-06: Found n = 1452771, Peter Benson
- 2008-03-16: Found n = 1170083, Peter Benson
- 2006-10-13: Checked n = 950000 - 1000000, Predrag Minovic
- 2005-07-14: Found n = 986130, Predrag Minovic
- 2005-03-22: Checked n = 880000 - 950000, Predrag Minovic
- 2005-03-21: Found n = 999599, Predrag Minovic
- 2004-12-30: Checked n = 820000 - 880000, Predrag Minovic
- 2004-11-04: Checked n = 760000 - 820000, Predrag Minovic
- 2004-10-11: Checked n = 553000 - 760000, Predrag Minovic
- 2004-08-15: Checked n = 515000 - 553000, Predrag Minovic
- 2004-08-11: Checked n = 500000 - 515000, Predrag Minovic
- 2004-08-11: Found n = 538657, Predrag Minovic
- 2004-08-03: Reserved by Predrag Minovic from n = 500000
- 2004-06-25: Checked n = 495000 - 500000, Steven Harvey, released
- 2004-06-24: Checked n = 450491 - 495000, Steven Harvey
- 2004-05-23: Reserved by Justin Van Klein to n = 1000000
- 2004-05-19: Checked n = 260274 - 450491, Steven Harvey
- 2004-05-07: Found n = 348547, Steven Harvey
- 2004-05-05: Found n = 332523, Steven Harvey
- 2004-04-30: Found n = 297499, Steven Harvey
- 2004-04-26: Checked n = 1 - 260274, Steven Harvey
- 2004-04-21: Checked n = 1 - 75523, 110000 - 120000, 151000 - 254394, 399589 - 400000, 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
