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A120491
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Numbers k such that 22*3^k + 1 is prime.
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0
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0, 1, 2, 4, 5, 10, 12, 14, 24, 34, 37, 52, 56, 65, 68, 96, 106, 128, 156, 169, 236, 254, 481, 618, 641, 672, 700, 774, 1274, 1625, 1841, 4650, 6030, 8372, 8760, 9173, 12776, 13873, 25214, 25548, 33834
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OFFSET
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1,3
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LINKS
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EXAMPLE
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If k=96 then 22*3^k + 1 is a prime with 48 digits.
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MATHEMATICA
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PROG
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(Magma) [ n: n in [0..3000] | IsPrime(22*3^n + 1) ] // Vincenzo Librandi, Jan 31 2011
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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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