357 is the only three-digit number such that 2*357^357-1 is prime. [Opao]
The smallest 3-digit number with its digits being 3 distinct odd-primes that is not prime nor any of the permutations of its digits represent a prime number. [Sladcik]
The prime numbers hockey player on YouTube misses the fact that 357 is composite.
The larger of the only two sphenic
numbers (product of three distinct primes) consisting
of distinct prime digits. [Beedassy]
The 357th century is the first to have more brilliant years than prime years (6 to 4). [Gaydos]