注目コメント算出アルゴリズムの一部にLINEヤフー株式会社の「建設的コメント順位付けモデルAPI」を使用しています
palindromic prime A palindromic prime is simply a prime which is a palindrome. Obviously this de... palindromic prime A palindromic prime is simply a prime which is a palindrome. Obviously this depends on the base in which the number is written (for example, Mersenne primes are palindromic base 2). When no radix is indicated, we assume the radix is 10. In base ten a palindrome with an even number of digits is divisible by 11. So 11 is the only palindromic prime with an even number of digits.
2012/02/07 リンク