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%I #27 Jan 17 2019 13:44:08
%S 2,7,10,11,17,19,39,49,50,61,95,106,187,196,849,889,6436,7370,14446,
%T 19647,34399,39922,81297,84305
%N Integers n such that 10^n-57 is prime.
%C Numbers corresponding to terms 849 and 889 are certified primes. (Primo 2.2.0 beta) - _Ryan Propper_, Jul 13 2005
%C No additional terms <100000.
%C See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99943".
%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 n = 7 is a member because: 10^7-57 = 10000000-57 = 9999943, which is prime.
%Y Cf. A089675, A095714, A092767, A108327, A108328, A108329, A108330, A108331, A108332, A177417.
%K more,nonn
%O 1,1
%A Julien Peter Benney (jpbenney(AT)ftml.net), Jul 06 2005
%E a(17)-a(19) from Kamada data by _Robert Price_, Dec 10 2010
%E a(20) from Kamada data by _Robert Price_, Dec 14 2010
%E a(21)-a(22) from _Robert Price_, Dec 15 2010
%E Edited by _Ray Chandler_, Dec 23 2010
%E a(23-24)=81297,84305 from _Robert Price_, May 29 2011
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