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%I
%S 0,6,10,11,102,146,296,1415,2324,4374,12590
%N Numbers k such that 22 * 10^k + 1 is prime.
%C All terms have been certified. Primality proof for the largest: PFGW Version 1.2.0 for Windows [FFT v23.8] Primality testing 22*10^12590+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 69.89% 22*10^12590+1 is prime! (47.5292s+0.3107s)
%C No more terms up to 31000.
%o (PARI) is(n)=ispseudoprime(22*10^n+1) \\ _Charles R Greathouse IV_, Jun 13 2017
%Y Cf. A056807.
%K more,nonn
%O 1,2
%A _Jason Earls_, Aug 26 2005
%E 0 added by _Arkadiusz Wesolowski_, Oct 27 2011
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