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A062698
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Primes of form 2n! + 1.
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1
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3, 5, 13, 241, 958003201, 12804747411456001, 20666295932772289859333302675046400000001, 3102237506574764560448486032938606422126519440033972224000000000001, 8549766568120051128596027506778799299380687576733627449344000000000001
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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PROG
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(PARI) for(n=1, 55, if(isprime(2*n!+1), print(2*n!+1)))
(PARI) { n=0; f=1; for (m=1, 10^5, f*=m; if(isprime(a=2*f + 1), write("b062698.txt", n++, " ", a); if (n==12, break)) ) } \\ Harry J. Smith, Aug 09 2009
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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