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A049536
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Primes of the form lcm(1, ..., n) + 1 = A003418(n) + 1.
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13
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2, 3, 7, 13, 61, 421, 2521, 232792561, 26771144401, 72201776446801, 442720643463713815201, 718766754945489455304472257065075294401, 6676878045498705789701874602220118271269436344024536001
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OFFSET
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1,1
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LINKS
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EXAMPLE
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Lcm(9) + 1 = lcm(10) + 1 = 2521, a prime.
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MATHEMATICA
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Select[Table[LCM@@Range[n]+1, {n, 150}], PrimeQ]//Union (* Harvey P. Dale, May 31 2017 *)
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PROG
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(PARI) N=1; print1(2); for(n=1, 1e3, if(isprimepower(n, &p), N*=p; if(isprime(N+1), print1(", "N+1)))) \\ Charles R Greathouse IV, Nov 18 2015
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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