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A204322
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Numbers k such that 4*5^k + 1 is prime.
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2
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0, 2, 6, 18, 50, 290, 2582, 20462, 23870, 26342, 31938, 38122, 65034, 70130, 245538, 851878, 1052422, 1496566, 5380542, 8431178
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OFFSET
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1,2
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COMMENTS
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All terms correspond to verified primes, that is, not merely probable primes. - Robert Price, Jan 16 2015
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LINKS
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MATHEMATICA
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Select[Range[0, 2000], PrimeQ[4*5^#+1]&]
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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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EXTENSIONS
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STATUS
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approved
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