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%I #24 Jan 17 2019 13:44:08
%S 1,2,83,167,242,14081,65537
%N Integers n such that 10^n + 27 is prime.
%C The next term, if one exists, is >100000. - _Robert Price_, May 24 2010
%C See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10027".
%H Makoto Kamada, <a href="https://stdkmd.net/nrr/prime/">List of near-repdigit-related prime numbers</a>.
%H <a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>.
%e For n=2 we have 10^2 + 27 = 100 + 27 = 127, which is prime.
%t Do[ If[ PrimeQ[10^n + 27], Print[n]], {n, 3000}] (* _Robert G. Wilson v_, Jul 01 2005 *)
%Y Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054.
%K more,nonn
%O 1,2
%A Julien Peter Benney (jpbenney(AT)ftml.net), Jun 29 2005
%E a(6)=14081 from _Robert Price_, Mar 22 2010
%E Edited by _Ray Chandler_, Dec 23 2010
%E a(7)=65537 from _Robert Price_, Jan 29 2011
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