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A085958
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Primes p such that 8p +1 and (p-1)/8 are primes.
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5
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17, 137, 809, 857, 3209, 6569, 7577, 9209, 11897, 16217, 17657, 19289, 21929, 23417, 30809, 35129, 37529, 41849, 46889, 53609, 56009, 66377, 70457, 74729, 76697, 78809, 80537, 88937, 91577, 95177, 96857, 103289, 129497, 141257, 165449, 166169
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OFFSET
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1,1
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LINKS
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EXAMPLE
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137 is a term as (137-1)/8 = 17 and 137*8 +1 = 1097 both are primes.
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MATHEMATICA
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Prime[ Select[ Range[15208], PrimeQ[ 8Prime[ # ] + 1] && PrimeQ[(Prime[ # ] - 1)/8] & ]]
Select[Prime[Range[16000]], PrimeQ[8#+1]&&PrimeQ[(#-1)/8]&] (* Harvey P. Dale, Jan 23 2013 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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