BBC Russian

A253605

Primes p such that the polynomial x^2 + x + p generates only primes for x=1..13.

17, 41, 27649987598537, 30431463129071

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

PROG

(PARI) isok(p) = {for (n=1, 13, if (! isprime(subst(x^2+x+p, x, n)), return (0)); ); 1; } \\ Michel Marcus, Jan 13 2015

CROSSREFS

Subsequence of A253592 and A191458. Cf. A164926.

KEYWORD

nonn,more

AUTHOR

Zak Seidov, Jan 05 2015

STATUS

approved