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%I A124117 #4 Mar 30 2012 17:34:57
%S A124117 21,129,1003,10681,101829,1020831,10251129,100780743,1051460221,
%T A124117 10153541853,103257526729,1483112006019
%N A124117 a(n) the smallest composite number of n+1 digits that becomes a prime by incrementing any one of the higher order digits.
%e A124117 a(4)=10681 as 20681, 11681, 10781 and 10691 are prime
%K A124117 hard,nonn,base
%O A124117 1,1
%A A124117 Anton Vrba (antonvrba(AT)yahoo.com), Nov 28 2006
%E A124117 a(11)-a(12) from _Donovan Johnson_, Nov 24 2010

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