%I A050857
%S A050857 1,13,23,37,43,67,83,151,661,811,3937,5027,5365,9307,11971,60295,89071,
%T A050857 89303,262877
%N A050857 Numbers n such that 211*2^n-1 is prime.
%H A050857 Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.net/
               riesel.html">List of primes k.2^n + 1 for k < 300</a>
%H A050857 Wilfrid Keller, <a href="http://www.prothsearch.net/riesel2.html">List 
               of primes k.2^n - 1 for k < 300</a>
%H A050857 Kosmaj, <a href="http://www.15k.org/riesellist.htm">Riesel list k<300</
               a>.
%H A050857 <a href="Sindx_Pri.html#riesel">Index entries for sequences of n such 
               that k*2^n-1 (or k*2^n+1) is prime</a>
%Y A050857 Sequence in context: A165459 A108794 A089777 this_sequence A089714 A070219 
               A046119
%Y A050857 Adjacent sequences: A050854 A050855 A050856 this_sequence A050858 A050859 
               A050860
%K A050857 hard,nonn
%O A050857 1,2
%A A050857 N. J. A. Sloane (njas(AT)research.att.com), Dec 29 1999
%E A050857 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008