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Search: id:A088332
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| A088332 |
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Primes of the form n!+1. |
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+0
12
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| 2, 3, 7, 39916801, 10888869450418352160768000001, 13763753091226345046315979581580902400000001, 33452526613163807108170062053440751665152000000001
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Of course 2 = 0!+1 = 1!+1 has two such representations.
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..11
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EXAMPLE
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3!+1 = 7 is prime.
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MATHEMATICA
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lst={}; Do[p=n!+1; If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 3*5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 27 2009]
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PROGRAM
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(PARI) factp1prime(n)=for(x=1, n, xf=x!+1; if(isprime(xf), print1(xf", ")))
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CROSSREFS
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Cf. A002981 (values of n).
Sequence in context: A077524 A088252 A048979 this_sequence A131959 A021046 A138180
Adjacent sequences: A088329 A088330 A088331 this_sequence A088333 A088334 A088335
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Nov 06 2003
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EXTENSIONS
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The next term is too large to include.
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