Project Euler Problem 37
I was surprised how fast my brute-force solution went, but it worked
Problem:
The number 3797 has an interesting property. Being prime itself, it is possible
to continuously remove digits from left to right, and remain prime at each
stage: 3797, 797, 97, and 7. Similarly we can work from right to left: 3797,
379, 37, and 3.
Find the sum of the only eleven primes that are both truncatable from left to
right and right to left.
NOTE: 2, 3, 5, and 7 are not considered to be truncatable primes.
1.8.11
