http://mathworld.wolfram.com/PrimeNumber.html
http://mathworld.wolfram.com/PalindromicNumber.html
http://mathworld.wolfram.com/PalindromicPrime.html
http://en.wikipedia.org/wiki/Palindromic_number
http://en.wikipedia.org/wiki/Palindromic_prime
http://en.wikipedia.org/wiki/Prime_number