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Difference between revisions of "Williams prime MM 5"
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(2019-01-17) |
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==Primes for ''n''== | ==Primes for ''n''== | ||
| − | 1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989 | + | 1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989, 498483, 504221 |
==Search range== | ==Search range== | ||
| − | + | 695000 (2019-01-17) | |
==History== | ==History== | ||
| Line 14: | Line 14: | ||
!Date!!Remark | !Date!!Remark | ||
|- | |- | ||
| − | |2018-12-07|| | + | |2019-01-17||Checked to ''n''=695000, found ''n''=498483 & 504221, [[User:Karbon|Karsten Bonath]] |
| + | |- | ||
| + | |2018-12-07||Checked to ''n''=321000, found ''n''=282989, [[User:Karbon|Karsten Bonath]] | ||
|- | |- | ||
|2007-20-12||Checked to ''n''=200000, Geoff Reynolds | |2007-20-12||Checked to ''n''=200000, Geoff Reynolds | ||
| Line 22: | Line 24: | ||
|2006-08||Found ''n''=15393, antiroach | |2006-08||Found ''n''=15393, antiroach | ||
|- | |- | ||
| − | |1981|| | + | |1981||Checked to ''n''=500, found ''n''=1 ... 339, [http://matwbn.icm.edu.pl/ksiazki/aa/aa39/aa3912.pdf H. C. Williams] |
|} | |} | ||
Revision as of 01:00, 18 January 2019
| Reserved! This sequence is currently reserved by: User:Karbon |
Definition
Primes of the form [math]\displaystyle{ 4 \cdot {5^n{-}1} }[/math].
Primes for n
1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989, 498483, 504221
Search range
695000 (2019-01-17)
History
| Date | Remark |
|---|---|
| 2019-01-17 | Checked to n=695000, found n=498483 & 504221, Karsten Bonath |
| 2018-12-07 | Checked to n=321000, 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 | Checked to n=500, found n=1 ... 339, H. C. Williams |
