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A268356
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Numbers n such that 8*9^n - 1 is prime.
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3
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0, 1, 2, 5, 25, 85, 92, 97, 649, 2017, 2978, 3577, 4985, 17978, 21365, 66002, 95305, 142199
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OFFSET
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1,3
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COMMENTS
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a(19) > 2*10^5.
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LINKS
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MATHEMATICA
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Select[Range[0, 200000], PrimeQ[8*9^# - 1] &] (* Robert Price, Feb 02 2016 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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