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A309410
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Numbers k such that (41^k + 1)/42 is 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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Larger terms correspond to probable primes.
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LINKS
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MATHEMATICA
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Do[p=Prime[n]; If[ PrimeQ[(41^p + 1)/42], Print[p]], {n, 1, 1000000}]
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PROG
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(PARI) is(n)=ispseudoprime((41^n+1)/42)
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CROSSREFS
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KEYWORD
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nonn,bref,hard,more
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AUTHOR
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STATUS
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approved
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