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Primes of the form 2^(2^n) + 357.
1

%I #7 Sep 08 2022 08:46:17

%S 359,373,613,4294967653,

%T 115792089237316195423570985008687907853269984665640564039457584007913129640293

%N Primes of the form 2^(2^n) + 357.

%C Terms given correspond to n = 0, 2, 3, 5 and 8.

%C Next term >= 2^2^24 + 357. - _Charles R Greathouse IV_, Jun 07 2016

%t Select[Table[2^(2^n) + 357, {n, 0, 15}], PrimeQ]

%o (Magma) [a: n in [0..16] | IsPrime(a) where a is 2^(2^n)+357];

%o (PARI) for(n=0,8, if(ispseudoprime(t=2^2^n+357), print1(t", "))) \\ _Charles R Greathouse IV_, Jun 07 2016

%Y Cf. similar sequences listed in A273547.

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Jun 02 2016