OFFSET
1,3
EXAMPLE
If n=95 then 4*n^4 + 7 = 325802507 (prime).
MATHEMATICA
Select[Range[0, 500], PrimeQ[4*#^4 + 7] &] (* Stefan Steinerberger, Jul 22 2006 *)
PROG
(PARI) is(n)=isprime(4*n^4+7) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,less,easy
AUTHOR
Parthasarathy Nambi, Jun 13 2006
EXTENSIONS
More terms from Stefan Steinerberger, Jul 22 2006
STATUS
approved