

A256301


Least prime p such that p + k! is prime for all k = 2..n.


1



2, 3, 5, 5, 17, 107, 107, 107, 107, 82954517, 82954517, 79017245897, 79017245897, 1490524895687, 13101487760627087
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OFFSET

1,1


COMMENTS

The function f(k;p) = p+(k+1)! could be called an example of a nonpolynomial prime generating function.


LINKS



PROG

(PARI) a(n)=forprime(p=1, , for(i=2, n, ispseudoprime(p+i!)next(2)); return(p))


CROSSREFS



KEYWORD

nonn,more


AUTHOR



EXTENSIONS

Erroneous a(12) deleted and new a(14) from Khalid Sabry, Jan 25 2020


STATUS

approved



