# 2309

This number is a prime.

The only known primorial prime of a palindromic prime. Note that (2309, 2311) is the third twin primorial prime pair. [Loungrides]

The first occurrence of a prime number of integers between the smaller and larger terms of an amicable pair.

The smallest number which leave remainders p-1 in each case when divided by the primes p up to 11. [Perrenoud]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell