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Primes of the form (6+k!)/6.
11

%I #12 Oct 14 2024 01:37:01

%S 2,5,604801,6652801,1037836801,14529715201,59281238016001,

%T 8515157028618240001

%N Primes of the form (6+k!)/6.

%C For numbers k for which (6+k!)/6 is prime see A139063.

%H Amiram Eldar, <a href="/A139062/b139062.txt">Table of n, a(n) for n = 1..17</a>

%F a(n) = A139153(A139063(n)). - _Amiram Eldar_, Oct 14 2024

%t a = {}; Do[If[PrimeQ[(n! + 6)/6], AppendTo[a, (n! + 6)/6]], {n, 1, 50}]; a

%o (PARI) for(k=3,1e3,if(ispseudoprime(t=k!/6+1),print1(t", "))) \\ _Charles R Greathouse IV_, Jul 15 2011

%Y Cf. A020458, A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139063, A139064, A139065, A139066, A139153.

%K nonn

%O 1,1

%A _Artur Jasinski_, Apr 07 2008