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A226528 Numbers k such that k^(2^13) + 1 is prime (a generalized Fermat prime). 28

%I #32 Feb 17 2024 15:04:01

%S 1,30406,71852,85654,111850,126308,134492,144642,147942,150152,165894,

%T 176206,180924,201170,212724,222764,225174,241600,241860,248744,

%U 268032,270674,302368,316970,326260,347962,350830,397468,410938,416010,424584,425848,426338

%N Numbers k such that k^(2^13) + 1 is prime (a generalized Fermat prime).

%H Ray Chandler, <a href="/A226528/b226528.txt">Table of n, a(n) for n = 1..10000</a>

%H PrimeGrid, <a href="http://www.primegrid.com/gfn_history13.php">GFN Prime Search Status and History: n=13</a>.

%o (PARI) is(n)=isprime(n^2^13+1) \\ _Charles R Greathouse IV_, Feb 17 2017

%Y Cf. A056993, A005574, A000068, A006314, A006313, A006315, A006316, A056994, A056995, A057465, A057002, A088361, A088362, A226529, A226530, A251597, A253854, A244150, A243959, A321323.

%K nonn

%O 1,2

%A _Robert G. Wilson v_, Jun 09 2013

%E Missing terms inserted (from link) by _Jeppe Stig Nielsen_, Apr 14 2017

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Last modified April 25 11:23 EDT 2024. Contains 371967 sequences. (Running on oeis4.)