2447

This number is a prime.

Just showing those entries submitted by 'Wood': (Click here to show all)

Zeroless; repeated even interior digit; 2^5+4^5+4^5+7^5 = 18887, same repetition. Only such 4-digit prime. [Wood]

There are 2447 sexy primes up to 100,000. Note that 2447 is itself a sexy prime (2441, 2447). [Homewood]