OFFSET
1,1
LINKS
Jens Kruse Andersen, Table of n, a(n) for n = 1..10000
EXAMPLE
47 is prime and 47^3 = 103823 is the concatenation of two primes (103 and 823) that are of the same length (here, their length is 3). So, 47 is a member of this sequence.
73 is not in the sequence since 73^3 = 389017, where 389 is a 3-digit prime but 017 is a 2-digit prime. - Jens Kruse Andersen, Oct 06 2014
PROG
(PARI)
forprime(p=1, 10^6, d=digits(p^3); if((#d)%2==0, if(isprime((p^3)\(10^(#d/2)))&&isprime((p^3)%(10^(#d/2)))&&#Str((p^3)%(10^(#d/2)))==#d/2, print1(p, ", "))))
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Derek Orr, Oct 03 2014
EXTENSIONS
Terms and PARI program corrected by Jens Kruse Andersen, Oct 06 2014
STATUS
approved