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A084713
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Smallest prime of the form (2n-1)^k + 2, or 0 if no such number exists.
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6
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3, 5, 7, 0, 11, 13, 0, 17, 19, 0, 23, 952809757913929, 0, 29, 31, 0, 1091, 37, 0, 41, 43, 0, 47
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OFFSET
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1,1
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COMMENTS
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a(3n+1) = 0, a(24) = 47^113 - 2 is a 189-digit number.
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LINKS
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EXAMPLE
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a(12) = 952809757913927 = 23^11 + 2.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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