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A071382
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Numbers n such that (30^n+1)/31 is a prime.
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15
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OFFSET
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1,1
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COMMENTS
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Some of the larger terms may only correspond to probable primes.
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LINKS
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MATHEMATICA
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PROG
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(PARI) isok(n) = (denominator(p=(30^n+1)/31)==1) && isprime(p); \\ Michel Marcus, Oct 29 2017
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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a(8) from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
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STATUS
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approved
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