OFFSET
0,1
LINKS
D. J. Broadhurst et al., Prime Numbers and Primality Testing, Topic 25454, Yahoo Groups, 2014
David Broadhurst, Kevin Acres, Mark Underwood, Base-10 puzzle, digest of 6 messages in primenumbers Yahoo group, Jan 16 - Feb 1, 2014.
EXAMPLE
23 is prime, so are 233, 2333, 23333, but not 233333 = 353 * 661. No prime smaller than 23 has this property for n = 3, so a(3) = 23.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Claudio Meller, Feb 05 2014
EXTENSIONS
a(1)-a(10) from David Broadhurst, Feb 01 2014
a(11) from Giovanni Resta, Feb 06 2014
STATUS
approved