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A062608
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Numbers k such that 42^k - 41^k is prime.
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1
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OFFSET
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1,1
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COMMENTS
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Terms greater than 1000 are often only strong pseudoprimes.
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LINKS
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MATHEMATICA
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Select[Range[5000], PrimeQ[42^# - 41^#] &] (* Harvey P. Dale, Mar 13 2011 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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