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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==
321000 (2018-12-07)
+
695000 (2019-01-17)
  
 
==History==
 
==History==
Line 14: Line 14:
 
!Date!!Remark
 
!Date!!Remark
 
|-
 
|-
|2018-12-07||Found ''n''=282989, [[User:Karbon|Karsten Bonath]]
+
|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||Found ''n''=1 ... 339, checked to ''n''=500, [http://matwbn.icm.edu.pl/ksiazki/aa/aa39/aa3912.pdf H. C. Williams]
+
|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

External links