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Difference between revisions of "Williams prime MM 5"

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{{Reserved|User:Karbon}}
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{{Williams prime
 
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|WiBase=5
==Definition==
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|WiMaxn=1000000
[[Prime number|Primes]] of the form <math>4 \cdot 5^n-1</math>.
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|WiDate=2024-08-30
 
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|WiReserved=
==Data==
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|WiNlist=
Primes for ''n'':
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1
:1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989
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3
 
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9
==Search range==
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13
321000 (2018-12-07)
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15
 
+
25
 +
39
 +
69
 +
165
 +
171
 +
209
 +
339
 +
2033
 +
6583
 +
15393
 +
282989
 +
498483
 +
504221
 +
754611;125947
 +
864751;126245
 +
|WiRemarks=The {{OEIS|l|A046865}}<br>See [https://www.mersenneforum.org/showthread.php?t=6131 Thread] at [[MersenneForum]]
 +
}}
 
==History==
 
==History==
{|class="wikitable"
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{{HistC|2024-08-30|'''Reservation''' dropped|Dylan Delgado}}
!Date!!Remark
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{{HistR|2019-05-11|Dylan Delgado|516518}}
|-
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{{HistC|2019-04-04|695000-1000000|Karsten Bonath|512625}}
|2018-12-07||Found ''n''=282989, [[User:Karbon|Karsten Bonath]]
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{{HistF|2019-02-25|864751|Karsten Bonath|509418}}
|-
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{{HistF|2019-01-28|754611|Karsten Bonath|507005}}
|2007-20-12||Checked to ''n''=200000, Geoff Reynolds
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{{HistC|2019-01-17|321000-695000|Karsten Bonath|506202}}
|-
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{{HistF|2019-01-17|498483 & 504221|Karsten Bonath|506202}}
|2007-07-13||Checked to ''n''=110000, Geoff Reynolds
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{{HistC|2018-12-07|1-321000|Karsten Bonath|501959}}
|-
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{{HistF|2018-12-07|282989|Karsten Bonath|501959}}
|2006-08||Found n=15393, antiroach
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{{HistC|2007-12-20|110000-200000|Geoffrey Reynolds}}
|-
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{{HistC|2007-07-13|100000-110000|Geoffrey Reynolds}}
|1981||Found ''n''=1 ... 339, checked to ''n''=500, [http://matwbn.icm.edu.pl/ksiazki/aa/aa39/aa3912.pdf H. C. Williams]
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{{HistC|2006-09-22|50000-100000|Geoffrey Reynolds|87710}}
|}
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{{HistC|2006-07-19|50000|(antiroach)|83800}}
 
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{{HistF|2006-07-17|15393|(antiroach)|83718}}
==External links==
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{{HistC|1981|500|Hugh C. Williams}}
* [https://en.wikipedia.org/wiki/Williams_number Article at en.wikipedia]
 
* [https://www.mersenneforum.org/showthread.php?t=6131 Mersenneforum thread]
 
* [https://oeis.org/A046865 The On-Line Encyclopedia of Integer Sequences OEIS: A046865]
 
 
 
[[Category:Williams primes|#.....5]]
 
[[Category:(b-1)*b^n-1|#.....5]]
 

Latest revision as of 22:28, 13 September 2024

Current data

Base : 5
Count : 20
Max n : 1,000,000
Date : 2024-08-30
1, 3, 9, 13, 15, 25, 39, 69, 165, 171, 209, 339, 2033, 6583, 15393, 282989, 498483, 504221, 754611, 864751
Remarks :
The sequence A046865 in OEIS
See Thread at MersenneForum

History