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A089437
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Numbers k such that 4^k + 3 is prime.
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6
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1, 2, 3, 6, 8, 9, 14, 15, 42, 114, 195, 392, 555, 852, 1004, 1185, 2001, 2030, 2031, 2276, 8610, 8967, 10362, 11366, 15927, 16514, 17877, 19122, 19898, 27728, 29156, 61275, 102981, 117663, 181560, 239922, 342789, 371226, 717200, 937776, 970406, 1102722
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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4^15 + 3 = 1073741827 a prime number.
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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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Herman H. Rosenfeld (herm3(AT)pacbell.net), Dec 28 2003
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EXTENSIONS
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STATUS
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approved
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