A329103 - OEIS

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A329103

Numbers k such that both k^2 - 3 and 2^k - 3 are primes.

%I #13 Feb 16 2024 15:20:34

%S 4,10,14,20,266,452,694

%N Numbers k such that both k^2 - 3 and 2^k - 3 are primes.

%C a(8) > 2086750, using A050414. - _Michael S. Branicky_, Feb 16 2024

%o (PARI) isok(k) = isprime(k^2 - 3) && isprime(2^k - 3); \\ _Michel Marcus_, Jul 02 2021

%Y Intersection of A050414 and A028873.

%Y Cf. A000040, A329102.

%K nonn,hard,more

%O 1,1

%A _Alex Ratushnyak_, Nov 04 2019