The book is now available! 357
(another Prime Pages' Curiosity)
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+ 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]




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