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%I #14 Sep 08 2022 08:45:20
%S 2,8,14,48,54,56,58,78,84,92,96,106,128,142,154,156,174,184,212,222,
%T 238,252,272,282,288,342,362,366,372,378,398,418,436,448,454,464,474,
%U 488,496,516,518,524,526,532,546,554,574,594,604,618,624,638,656,664,702
%N Numbers n such that 23*n^2 - 25 is prime.
%e If n=92 then (23*n^2) - 25 = 194647 (prime).
%t Select[Range[1000],PrimeQ[23#^2-25]&] (* _Harvey P. Dale_, Jun 10 2014 *)
%o (Magma) [n: n in [2..100000] |IsPrime((23*n^2)-25)] - _Vincenzo Librandi_, Nov 13 2010
%o (PARI) is(n)=isprime(23*n^2-25) \\ _Charles R Greathouse IV_, Jun 13 2017
%K nonn,easy
%O 1,1
%A _Parthasarathy Nambi_, Sep 30 2005
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