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%I #18 Jan 17 2019 10:08:17
%S 1,4,5,7,9,11,13,17,19,23,29,37,49,61,79,99,121,133,141,164,173,181,
%T 185,193,233,299,313,351,377,540,569,909,1057,1081,1189,1679,2043,
%U 2641,3471,3533,3943,5607,9681,12879,14513,15300,21573,30895,32163,39983,47167,47657,49325,51881,64801,65385,65723,66017,69020,74111,76803,79956,83761,84437,100916,110617,165841,195515,234305,234916,236989,239019,352196,362787,464843,580596,613781,820237,831617,867653,978209
%N Numbers n such that 69*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(69*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
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