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A290022 Prime numbers of the form 6^k - 7. 1

%I #8 Sep 03 2017 21:33:08

%S 29,1289,46649,1679609,10077689,60466169,470184984569,

%T 3656158440062969,623673825204293256669089197883129849,

%U 134713546244127343440523266742756048889,293242067884135544935936513642647623193965101049

%N Prime numbers of the form 6^k - 7.

%H Robert Price, <a href="/A290022/b290022.txt">Table of n, a(n) for n = 1..14</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 - 7], {k, 2, 100}], PrimeQ[#] &]

%Y Cf. A217352.

%K nonn

%O 1,1

%A _Robert Price_, Sep 03 2017

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Last modified April 19 16:08 EDT 2024. Contains 371794 sequences. (Running on oeis4.)