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Numbers k such that 93*2^k+1 is prime.
1

%I #28 Sep 19 2019 03:41:34

%S 2,4,6,10,12,30,42,44,52,70,76,108,122,164,170,226,298,398,686,1020,

%T 1110,1478,1646,2032,2066,2800,2816,8568,9678,11108,16930,20917,24210,

%U 24994,38288,61904,63016,67722,89310,122056,135908,155174,191748,197778

%N Numbers k such that 93*2^k+1 is prime.

%H Joerg Arndt, <a href="/A032396/b032396.txt">Table of n, a(n) for n = 1..60</a> (from http://www.prothsearch.com/riesel1.html)

%H Ray Ballinger, <a href="http://www.prothsearch.com/index.html">Proth Search Page</a>

%H Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.com/riesel1.html">List of primes k.2^n + 1 for k < 300</a>

%H Y. Gallot, <a href="http://www.utm.edu/research/primes/programs/gallot/index.html">Proth.exe: Windows Program for Finding Large Primes</a>

%H Wilfrid Keller, <a href="http://www.prothsearch.com/riesel2.html">List of primes k.2^n - 1 for k < 300</a>

%H <a href="/index/Pri#riesel">Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime</a>

%o (PARI) is(n)=ispseudoprime(93*2^n+1) \\ _Charles R Greathouse IV_, Jun 07 2017

%K nonn,hard

%O 1,1

%A _James R. Buddenhagen_

%E More terms from _Hugo Pfoertner_, Jun 20 2003