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palindromic prime numbers

A palindromic prime is a prime number whose decimal representation reads the same forwards and backwards.

The first few palindromic prime numbers are: 2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, …

113 of the first one million positive integers are palindromic prime.

Learn more about palindromic prime numbers on wikipedia.

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