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%I #9 Sep 08 2022 08:45:53
%S 5,23,2003,200003,2000003,20000003,2000000000003,20000000000000003,
%T 200000000000000003,20000000000000000000003,2000000000000000000000003,
%U 200000000000000000000000000000000003
%N Primes of the form 2*10^n + 3.
%H Makoto Kamada, <a href="https://stdkmd.net/nrr/2/20003.htm#prime">Prime numbers of the form 200...003</a>.
%o (Magma) [ a: n in [0..250] | IsPrime(a) where a is 2*10^n + 3 ]
%Y Cf. A081677, A101951.
%K nonn
%O 1,1
%A _Vincenzo Librandi_, Dec 10 2010
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