Post date: Apr 27, 2020 12:00:39 PM
The smallest 3 digit prime such that all other arrangements of its digits are also prime.
The three circularly permuted primes, i.e., 113, 131 and 311, can be concatenated in 3! different ways. After inserting a prime digit as a separator between these concatenated primes, the following four 11-digit primes can be obtained: 11371317311, 31151315113, 13153115113 and 11373117131. Note that the first two numbers are palindromic primes.