Search: id:A110772
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%I A110772
%S A110772 2,3,9,11,13,63,51,29,69,33,49,159,17,37,39,117,53,43,47,31,23,97,171,
%T A110772 89,367,347,157,83,447,19,249,153,233,163,141,317,471,391,107,93,261,
%U A110772 339,183,87,403,129,81,173,411,57,177,109,71,121,269,609,111,1413,99,21
%N A110772 Beginning with 2, least number not occurring earlier such that every 
               partial concatenation is prime.
%C A110772 Conjecture: every odd number not divisible by 5 is a member.
%e A110772 2,23,239,23911,2391113,... etc. are all prime.
%p A110772 L:=[2]: for n from 1 to 120 do for m from 1 do if isprime(parse(cat("",
               op(L),m))) and not member(m,L) then L:=[op(L),m]; break fi od od: 
               L[]; (Mihailovs)
%Y A110772 Cf. A110773.
%Y A110772 Sequence in context: A140222 A121557 A138984 this_sequence A074338 A111319 
               A109658
%Y A110772 Adjacent sequences: A110769 A110770 A110771 this_sequence A110773 A110774 
               A110775
%K A110772 easy,nonn
%O A110772 1,1
%A A110772 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 12 2005
%E A110772 More terms from Alec Mihailovs (alec(AT)mihailovs.com), Aug 14 2005

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