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%I #8 Sep 04 2017 19:29:06
%S 5,47,271818611111,1718264124282290785247,
%T 5874403106360420018879553647,
%U 802525857116673306810957202573831816754829436253827247,17343773367030267519903781288812032158308062539012091953077767198995511
%N Primes of the form 43^k + 4.
%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[43k+4], {k, 0, 100}], PrimeQ[#] &]
%Y Cf. A230433.
%K nonn
%O 1,1
%A _Robert Price_, Sep 04 2017
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