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A217135
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Numbers k such that 3^k - 8 is prime.
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17
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3, 4, 7, 8, 14, 20, 22, 62, 139, 254, 272, 430, 907, 1906, 2278, 2827, 3598, 6812, 15266, 20915, 26180, 26342, 27022, 48275, 65186, 69247, 86647
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[2, 5000], PrimeQ[3^# - 8] &]
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PROG
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(PARI) for(n=2, 5*10^3, if(isprime(3^n-8), print1(n", ")))
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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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