Difference between revisions of "Riesel prime 2 27"

Revision as of 18:13, 16 April 2025

Current data

`k` , `b` :	27 , 2
Type :	3
Count :	68
Nash :	2376
Max `n` :	10,000,000
Date :	2022-03-21

1^[1], 2^[2], 4^[3], 5, 8, 10, 14, 28^[4], 37^[5], 38, 70, 121^[6], 122, 160, 170, 253, 329, 362, 454, 485, 500, 574, 892, 962, 1213, 1580, 2642, 2708, 4505, 8152, 11858, 13300, 15041, 16118, 16778, 19069, 22769, 29020, 30298, 30377, 35942, 42817, 42869, 62024, 74629, 90449, 91042, 117901, 128594, 143330, 152530, 157898, 175852, 282700, 340682, 444622, 627794, 729314, 777992, 1108214, 1163629, 1253870, 1902689, 3855094, 4542344, 4583717, 8342438, 10902757

Remarks :

The sequence A050539 in OEIS

Notes

Jump up ↑ Sophie Germain n=1
Jump up ↑ Twin n=2
Jump up ↑ Sophie Germain n=4, Twin n=4
Jump up ↑ Near Woodall 27•2²⁸-1
Jump up ↑ Sophie Germain n=37
Jump up ↑ Sophie Germain n=121

History

2022-03-21: Checked n = 1850000 - 10000000, PrimeGrid 27121 Prime Search, released
2022-03-07: Found n = 10902757, Ryan Propper
2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
2021-02-01: Found n = 8342438, Andrew M. Farrow, PrimeGrid 27121 Prime Search, (Official announcement)
2014-08-23: Found n = 4583717, Hans Joachim Böhm, PrimeGrid 27121 Prime Search, (Official announcement)
2014-07-18: Found n = 4542344, James Scott Brown, PrimeGrid 27121 Prime Search, (Official announcement)
2012-02-28: Found n = 3855094, Pietari Snow, PrimeGrid 27121 Prime Search, (Official announcement)
2009-12-10: Found n = 1902689, Peter Kaiser, PrimeGrid 27121 Prime Search
2009-02-19: Found n = 282700, Steven Harvey, missing prime found
2009-02-13: Reserved by PrimeGrid 27121 Prime Search
2009-02?: Checked n = 1614000 - 1850000, 27121 Search, see test limit near bottom of page here
2009-01-10: Checked n = 1019000 - 1614000, 27121 Search
2009-01-09: Checked n = 950000 - 1021707, 1140008 - 1169108, 1430041 - 1453229, 1652053 - 1732192, 1967648 - 2014322, Peter Benson
2008-06-29: Found n = 1253870, Frank Clowes, 27121 Search
2008-03-23: Found n = 1108214, Arnold Padro, 27121 Search
2008-03-17: Found n = 1163629, Peter Benson
2007-12-02: Checked n = 500000 - 1019000, 27121 Search
2005-11-18: Found n = 777992, James P. Burt, 27121 Search
2005-07-14: Found n = 729314, William W. Mikrut, 27121 Search
2005-03-31: Found n = 627794, Chris Chatfield, 27121 Search
2005-03-01: Reserved by 27121 Search
2004-08-06: Checked n = 488150 - 500000, Steven Harvey, released
2004-08-03: Checked n = 483950 - 488150, Steven Harvey
2004-08-01: Checked n = 476558 - 483950, Steven Harvey
2004-07-26: Checked n = 449765 - 476558, Steven Harvey
2004-07-12: Checked n = 409000 - 449765, Steven Harvey
2004-07-12: Found n = 444622, Steven Harvey
2004-06-24: Checked n = 302500 - 409000, Steven Harvey
2004-05-31: Found n = 340682, Steven Harvey
2004-05-19: Reserved by Steven Harvey to n = 500000
2004-05-18: Checked n = 155000 - 302500, Christian Hercher, released
2004-04-21: none, Steven Harvey, released
2004-04-21: Checked n = 1 - 155000, Christian Hercher
2004-04-21: Checked n = 175852 - 276170, Steven Harvey
2003-06-22: Found n = 175852, Stephane Roth
2002-09-07: Found n = 157898, Stephane Roth
2002-07-10: Found n = 152530, Stephane Roth
2002-04-24: Found n = 143330, Stephane Roth
2001-08-05: Found n = 128594, Stephane Roth
2001-04-08: Found n = 91042, Stephane Roth
2001-04-05: Found n = 90449, Stephane Roth
2001-02-12: Found n = 74629, Stephane Roth
2001-04-14: Found n = 62024, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
2000-05-19: Found n = 42869, Phil Carmody
2000-05-19: Found n = 42817, Phil Carmody
1999-10-15: Found n = 35942, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
1998-08-23: Found n = 30377, Wilfrid Keller
1998-08-23: Found n = 30298, Wilfrid Keller
1998-08-23: Found n = 29020, Wilfrid Keller
1998-08-08: Found n = 22769, Wilfrid Keller
1989: Found n = 19069, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
1989: Found n = 13300, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
1989: Found n = 8152, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown

[1] Jump up ↑ Sophie Germain n=1

[2] Jump up ↑ Twin n=2

[3] Jump up ↑ Sophie Germain n=4, Twin n=4

[4] Jump up ↑ Near Woodall 27•2²⁸-1

[5] Jump up ↑ Sophie Germain n=37

[6] Jump up ↑ Sophie Germain n=121

[1]

[2]

[3]

[4]

[5]

[6]

@@ Line 80: / Line 80: @@
 }}
 ==History==
-{{HistC|2022-03-21|1614000-10000000|PrimeGrid 27121 Prime Search|P#9850#154888}}, released
+{{HistC|2022-03-21|1850000-10000000|PrimeGrid 27121 Prime Search|P#9850#154888}}, released
 {{HistF|2022-03-07|10902757|Ryan Propper}}
 {{HistC|2021-03-21|1-1000000|Gary Barnes|776590}}, double check, results included
 {{HistF|2021-02-01|8342438|Andrew M. Farrow,PrimeGrid 27121 Prime Search|P#9616#149148}}, ([https://www.primegrid.com/download/27121-8342438.pdf Official announcement])
-{{HistF|2014-08-22|4583717|Hans Joachim Böhm,PrimeGrid 27121 Prime Search|P#5871#79239}}, ([http://www.primegrid.com/download/27121-4583717.pdf Official announcement])
+{{HistF|2014-08-23|4583717|Hans Joachim Böhm,PrimeGrid 27121 Prime Search|P#5871#79239}}, ([http://www.primegrid.com/download/27121-4583717.pdf Official announcement])
 {{HistF|2014-07-18|4542344|James Scott Brown,PrimeGrid 27121 Prime Search|P#5842#78551}}, ([http://www.primegrid.com/download/27121-4542344.pdf Official announcement])
 {{HistF|2012-02-28|3855094|Pietari Snow,PrimeGrid 27121 Prime Search|P#4131#50778}}, ([http://www.primegrid.com/download/27121-3855094.pdf Official announcement])
@@ Line 90: / Line 90: @@
 {{HistF|2009-02-19|282700|Steven Harvey|M#216803}}, missing prime found
 {{HistR|2009-02-13|PrimeGrid 27121 Prime Search|P#1229#13574}}
+{{HistC|2009-02?|1614000-1850000|27121 Search}}, see test limit near bottom of page [https://web.archive.org/web/20100518081012/http://www.bodang.com/12121/27k/ here]
 {{HistC|2009-01-10|1019000-1614000|27121 Search|M#209145}}
 {{HistC|2009-01-09|950000-1021707, 1140008-1169108, 1430041-1453229, 1652053-1732192, 1967648-2014322|Peter Benson|M#209004}}

Difference between revisions of "Riesel prime 2 27"

Revision as of 18:13, 16 April 2025

Current data

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