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Search: id:A122095
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| A122095 |
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Primes for which 8p+1 divides 2^p-1. |
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+0
1
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| 11, 29, 179, 239, 431, 761, 857, 941, 1367, 1667, 1871, 1877, 2411, 2837, 3041, 3119, 3329, 3347, 3767, 4289, 5021, 5087, 5231, 5261, 5717, 5861, 6449, 6917, 6959, 7079, 7211, 7919, 8429, 8741, 8867, 9341, 9461, 9851, 10211, 10979, 12107, 12437, 12479
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The first 962 terms, all those with n<500000, are also in A023228. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 20 2006
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EXAMPLE
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29 is in this sequence because 2^29-1 is divisible by 8 * 29 + 1 = 233
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MAPLE
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isA122095 := proc(n) RETURN( isprime(n) and ( (2^n-1) mod (8*n+1)) = 0 ) ; end: n := 1 : for a from 2 to 500000 do if isA122095(a) then print(n, a) ; n := n+1 ; fi ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 20 2006
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CROSSREFS
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Sequence in context: A115972 A099109 A024831 this_sequence A027758 A057739 A146751
Adjacent sequences: A122092 A122093 A122094 this_sequence A122096 A122097 A122098
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KEYWORD
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nonn
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AUTHOR
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J. Lowell (jhbubby(AT)mindspring.com), Oct 17 2006
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 20 2006
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