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%I #8 Sep 03 2017 21:34:05
%S 31,211,1291,36845653286788892983291,1326443518324400147398651,
%T 286511799958070431838109691,
%U 174588755932389037098918153698611839369211,380041719977839666236973721680871319659378770968571
%N Prime numbers of the form 6^k - 5.
%H Robert Price, <a href="/A290008/b290008.txt">Table of n, a(n) for n = 1..10</a>
%H F. Firoozbakht, M. F. Hasler, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL13/Hasler/hasler2.html">Variations on Euclid's formula for Perfect Numbers</a>, JIS 13 (2010) #10.3.1.
%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>
%H OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t Select[Table[6^k - 5], {k, 1, 100}], PrimeQ[#] &]
%Y Cf. A059614.
%K nonn
%O 1,1
%A _Robert Price_, Sep 03 2017