Palindromic Primes
A palindromic prime (sometimes called a palprime) is a prime number that is also a palindromic number. Palindromicity depends on the base of the numbering system and its writing conventions, while primality is independent of such concerns.
Except for 11, all palindromic primes have an odd number of digits, because the divisibility test for 11 tells us that every palindromic number with an even number of digits is a multiple of 11.
First 20: 2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929
Checkout list of first: 10, 50, 100, 500 palindromic primes. You can also check all palindromic primes.
External#
- OEIS: A002385
- Wikipedia: Palindromic Primes
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