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A032361
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Numbers k such that 23*2^k+1 is prime.
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1
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1, 9, 13, 29, 41, 49, 69, 73, 341, 381, 389, 649, 1961, 3929, 977541, 1399841, 1448461, 2425641, 4300741
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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EXTENSIONS
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Added more terms (from http://www.prothsearch.com/riesel1.html), Joerg Arndt, Apr 07 2013
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STATUS
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approved
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