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Difference between revisions of "Williams prime MM 5"
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|2018-12-07||Found ''n''=282989, [[User:Karbon|Karsten Bonath]] | |2018-12-07||Found ''n''=282989, [[User:Karbon|Karsten Bonath]] | ||
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− | |2007-20-12|| | + | |2007-20-12||Checked to ''n''=200000, Geoff Reynolds |
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− | |2007-07-13|| | + | |2007-07-13||Checked to ''n''=110000, Geoff Reynolds |
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|2006-08||Found n=15393, antiroach | |2006-08||Found n=15393, antiroach |
Revision as of 10:39, 12 December 2018
Reserved! This sequence is currently reserved by: User:Karbon |
Definition
Primes of the form [math]\displaystyle{ 4 \cdot 5^n-1 }[/math].
Data
Primes for n:
- 1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989
Search range
321000 (2018-12-07)
History
Date | Remark |
---|---|
2018-12-07 | Found n=282989, Karsten Bonath |
2007-20-12 | Checked to n=200000, Geoff Reynolds |
2007-07-13 | Checked to n=110000, Geoff Reynolds |
2006-08 | Found n=15393, antiroach |
1981 | Found n=1 ... 339, checked to n=500, H. C. Williams |