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Primes of the form 2^(2^n) + 177.
1

%I #9 Sep 08 2022 08:46:16

%S 179,181,193,433,65713

%N Primes of the form 2^(2^n) + 177.

%C Terms given correspond to n = 0, 1, 2, 3, and 4.

%C Next term >= 2^2^23 + 177. - _Charles R Greathouse IV_, Jun 08 2016

%t Select[Table[2^(2^n) + 177, {n, 0, 15}], PrimeQ]

%o (Magma) [a: n in [0..15] | IsPrime(a) where a is 2^(2^n)+177];

%o (PARI) for(n=0, 4, if(ispseudoprime(t=2^2^n+177), print1(t", "))) \\ _Charles R Greathouse IV_, Jun 08 2016

%Y Cf. similar sequences listed in A273547.

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Jun 01 2016