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A329532
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Numbers k such that Product_{j=1..k} prime(j) + Product_{j=k+1..2*k} prime(j) is prime.
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2
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OFFSET
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1,2
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COMMENTS
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Based on discussion in primenumbers Yahoo group dated May 12, 2004, with a(9) = 1238 given by Jens Kruse Andersen.
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LINKS
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Cashogor, Payam Samidoost, David Cleaver, Jens Kruse Andersen, Creating Primes, digest of 9 messages in primenumbers Yahoo group, May 12, 2004. [Cached copy]
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PROG
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(PARI) for (k=1, 100, if (ispseudoprime(prod(j=1, k, prime(j))+prod(j=k+1, k+k, prime(j))), print1(k, ", ")))
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CROSSREFS
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KEYWORD
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nonn,more,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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