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A269066 Five-digit primes whose first, third, and fifth digits are the same. 2

%I

%S 10111,10141,10151,10181,11131,11161,11171,12101,12161,13121,13151,

%T 13171,15101,15121,15131,15161,16111,16141,17191,18121,18131,18181,

%U 18191,19121,19141,19181,30313,30323,31333,31393,32303,32323,32353,32363,33343,33353,34303

%N Five-digit primes whose first, third, and fifth digits are the same.

%C There are 107 such primes.

%H Harvey P. Dale, <a href="/A269066/b269066.txt">Table of n, a(n) for n = 1..107</a>

%e 13151 is a prime and its first, third, and fifth digits are the same.

%t Select[Prime[Range[1230,9592]],MatchQ[IntegerDigits[#],{x_,_,x_,_,x_}]&]

%Y Cf. A269564

%K nonn,base,fini

%O 1,1

%A _Harvey P. Dale_, Feb 21 2016

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Last modified May 15 18:26 EDT 2021. Contains 343920 sequences. (Running on oeis4.)