%I A028990
%S A028990 7,929,98689,9989899,999727999,99999199999,9999987899999,
%T A028990 999999787999999,99999999299999999,9999999992999999999,
%U A028990 999999999757999999999,99999999997579999999999
%N A028990 Largest palindromic prime with 2n+1 digits.
%H A028990 P. De Geest, <a href="http://www.worldofnumbers.com/palpri.htm">World!Of 
               Palindromic Primes</a>
%Y A028990 Sequence in context: A127102 A038808 A068728 this_sequence A151579 A024098 
               A004786
%Y A028990 Adjacent sequences: A028987 A028988 A028989 this_sequence A028991 A028992 
               A028993
%K A028990 nonn,base
%O A028990 0,1
%A A028990 Patrick De Geest (pdg(AT)worldofnumbers.com)