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A062574
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Numbers k such that 8^k - 7^k is prime or a strong pseudoprime.
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4
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7, 11, 17, 29, 31, 79, 113, 131, 139, 4357, 44029, 76213, 83663, 173687, 336419, 615997
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OFFSET
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1,1
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COMMENTS
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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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New term 615997 found by Jean-Louis Charton corresponding to a probable prime with 556301 digits. Jean-Louis Charton, Sep 02 2009
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STATUS
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approved
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