A255976 Primes that are the concatenation of two 3-digit primes.

101107, 101113, 101149, 101173, 101197, 101281, 101293, 101347, 101359, 101383, 101419, 101449, 101467, 101503, 101599, 101641, 101653, 101701, 101719, 101797, 101839, 101863, 101929, 101977, 103307, 103349, 103409, 103421, 103457, 103577, 103613, 103619, 103643

Offset

1,1

Comments

The last term is a(2753) = 997991.

Links

Zak Seidov, Table of n, a(n) for n = 1..2753

Mathematica

Select[1000 First@ # + Last@ # & /@ Permutations[Select[Range[100, 999], PrimeQ], {2}], PrimeQ] (* Michael De Vlieger, Mar 13 2015 *)

Crossrefs

A168529 is a subsequence.

Subsequence of A105184.

Sequence in context: A210888 A115828 A168529 * A161796 A383918 A096929

Adjacent sequences: A255973 A255974 A255975 * A255977 A255978 A255979

Keyword

nonn,base,fini,full,changed

Author

Zak Seidov, Mar 12 2015

Status

approved