%I #18 Jan 17 2019 10:08:17
%S 1,3,7,19,25,27,71,97,231,235,291,295,313,347,491,511,531,571,803,
%T 1499,1523,1607,1743,2161,2231,3113,5511,5863,6039,8055,8443,9707,
%U 12155,12195,21049,24271,34403,34879,56491,58839,162583,207863,220147,560259
%N Numbers n such that 229*2^n-1 is prime.
%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 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>
%H Kosmaj, <a href="http://www.15k.org/riesellist.html">Riesel list k<300</a>.
%o (PARI) is(n)=ispseudoprime(229*2^n-1) \\ _Charles R Greathouse IV_, Jun 13 2017
%K hard,nonn
%O 1,2
%A _N. J. A. Sloane_, Dec 29 1999
%E More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008