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13, together with primes of the form 10^k + 13 for some k >= 0.
1

%I #8 May 26 2024 18:18:49

%S 13,113,1013,100000000000000013,10000000000000000000000013,

%T 1000000000000000000000000000000000000000000000000000000000000000000000000000000013

%N 13, together with primes of the form 10^k + 13 for some k >= 0.

%C The next term has 141 digits. - _Harvey P. Dale_, May 26 2024

%t Join[{13},Select[Table[FromDigits[PadRight[{1},n,0]]+13,{n,100}],PrimeQ]] (* _Harvey P. Dale_, May 26 2024 *)

%Y See A095688 for the values of k.

%Y Cf. A093011.

%K nonn

%O 1,1

%A Xavier Bury (x(AT)monsieurx.com), Jul 04 2004

%E Corrected by _N. J. A. Sloane_, Dec 31 2016 at the suggestion of _Harvey P. Dale_.

%E Corrected by _Harvey P. Dale_, May 26 2024