title: How many circular primes are there below one million?
url: http://projecteuler.net/problem=35

desc: |
  The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime.
  There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, and 97.
  How many circular primes are there below one million?
solution: Bruteforce
solutions: