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A062622
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Numbers k such that 56^k - 55^k is a prime.
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0
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OFFSET
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1,1
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COMMENTS
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Terms greater than 1000 often correspond only to strong pseudoprimes. [Clarified by M. F. Hasler, Sep 15 2013]
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LINKS
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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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STATUS
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approved
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