Search: id:A070219
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%I A070219
%S A070219 13,23,37,47,59,67,79,89,911,1013,1117,1213,1319,1423,1523,1619,1721,
%T A070219 1823,1931,2027,2129,2237,2333,2437,2531,2633,2729,2833,2939,3037,3137,
%U A070219 3251,3343,3449,3539,3637,3739,3847,3943,4049,4153,4243,4349,4447,4547
%N A070219 Smallest prime obtained as a concatenation of n and a number m greater 
               than n.
%C A070219 If we change the definition to m >= n, then a(1) becomes 11, but nothing 
               else changes.
%C A070219 Conjectures: There is at least one number k with n<k<2n such that the 
               concatenation n and n+k is a prime. For all m there is at least one 
               number k with m*n < k < (m+1)*n such that the concatenation n and 
               n+k is a prime.
%Y A070219 Cf. A089713, A089715.
%Y A070219 Sequence in context: A089777 A050857 A089714 this_sequence A046119 A164408 
               A164416
%Y A070219 Adjacent sequences: A070216 A070217 A070218 this_sequence A070220 A070221 
               A070222
%K A070219 base,nonn
%O A070219 1,1
%A A070219 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 17 2003
%E A070219 Edited by David Wasserman (wasserma(AT)spawar.navy.mil), Feb 05 2004
%E A070219 Further edited by N. J. A. Sloane (njas(AT)research.att.com), Oct 21 
               2008 at the suggestion of R. J. Mathar

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