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%I #22 Feb 18 2024 02:04:25
%S 4567,14151617,20212223,34353637,58596061,64656667,118119120121,
%T 140141142143,148149150151,176177178179,196197198199,218219220221,
%U 220221222223,236237238239,238239240241,268269270271,278279280281
%N Primes which are concatenations of four consecutive numbers.
%C There are no primes which are concatenations of three consecutive numbers, in fact all such concatenations are divisible by 3. - _Zak Seidov_, Oct 25 2014
%H Zak Seidov, <a href="/A030471/b030471.txt">Table of n, a(n) for n = 1..1000</a>
%o (PARI) lista(nn) = for(n=1, nn, if (isprime(q=eval(concat(concat(concat(Str(n), Str(n+1)), Str(n+2)), Str(n+3)))), print1(q, ", "))); \\ _Michel Marcus_, Oct 26 2014
%Y Cf. A030470, A084551.
%K nonn,base
%O 1,1
%A _Patrick De Geest_
%E Edited by _Charles R Greathouse IV_, Apr 23 2010
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