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A322950
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Numbers k such that 317*2^k+1 is prime.
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0
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7, 11, 243, 291, 327, 1211, 7331, 26775, 101603, 171071, 284795, 295195, 323871, 589755, 833467, 1047471
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Range[1000], PrimeQ[317*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
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CROSSREFS
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KEYWORD
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nonn,more,hard
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AUTHOR
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STATUS
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approved
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