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Search: id:A092789
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A092789 a(n) = smallest prime of the form n! + p where p is prime. +0
1
3, 5, 7, 13, 13, 19, 19, 43, 29, 31, 37, 43, 43, 67, 53, 59, 61, 67, 73, 73, 79, 103, 89, 113, 103, 103, 109, 109, 229, 137, 151, 137, 139, 163, 151, 157, 163, 283, 173, 179, 181, 363061, 193, 199, 199, 223, 331, 229, 229, 349, 239, 241, 5281, 257, 263, 269, 271 (list; graph; listen)
OFFSET

0,1

COMMENT

n! + p is composite for n >= p since p divides n! for n >= p.

PROGRAM

(PARI) nfactpm3(n) = { forprime(p=1, n, c=0; for(x=0, n, y=x!+p; if(isprime(y), c++; print1(y", "); break)); ) }

CROSSREFS

Cf. A092789.

Sequence in context: A098957 A018205 A121047 this_sequence A092793 A024909 A063241

Adjacent sequences: A092786 A092787 A092788 this_sequence A092790 A092791 A092792

KEYWORD

nonn

AUTHOR

Cino Hilliard (hillcino368(AT)gmail.com), Apr 14 2004

page 1

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.


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