%I #11 Nov 14 2021 12:33:17
%S 11,3,777,999,11,33333333,777777777777777777777,
%T 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999,
%U 1111111111111111111111111
%N Copies of 1,3,7 and 9 cyclically such that every partial concatenation is a prime.
%e 11, 113, 113777, 113777999, ... are all prime.
%Y Cf. A110774, A110775, A110776, A110777, A110778, A110780, A110781, A110783.
%K base,nonn
%O 1,1
%A _Amarnath Murthy_, Aug 12 2005
%E More terms from _Joshua Zucker_, Jan 11 2006
%E The next term is 726 3's and is too large to include.
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