

A084559


Smallest a(n) > n such that concatenation of numbers from n to a(n) is a prime.


0




OFFSET

2,1


COMMENTS

Terms a(1) and a(10) are currently unknown.
a(11) = 309, a(12) = 13.
a(1) > 344869.  Sean A. Irvine, Jun 17 2019


LINKS

Table of n, a(n) for n=2..9.
Eric Weisstein's World of Mathematics, Consecutive Number Sequences.
Eric Weisstein's World of Mathematics, Smarandache Prime


EXAMPLE

a(4) = 7 because 4567 is a prime.


CROSSREFS

Cf. A030458, A030471, A052087, A052088, A052089.
Sequence in context: A258007 A293700 A114365 * A272815 A179767 A244605
Adjacent sequences: A084556 A084557 A084558 * A084560 A084561 A084562


KEYWORD

nonn,base,hard,more


AUTHOR

Zak Seidov, Jun 27 2003


EXTENSIONS

Edited by Max Alekseyev, Jan 28 2012
a(4) corrected by Daniel Suteu, Jun 16 2019


STATUS

approved



