17

This number is a prime.

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Prime Numbers CD Image J. Neptune © 1994

The smallest prime of the form p² + q³, where p and q are primes. [Russo]

The smallest two-digit prime of the form F(i)³ + F(j)⁴, where F(n) are Fibonacci numbers. [Russo]

There are 4 ways to express 17 as p+2q; p, q primes. [Russo]

The smallest automorphic prime, i.e., a prime p such that p is the kth prime and p ends in k. [Russo and Rivera]