17

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Prime Numbers CD Image J. Neptune © 1994
+ 17 is the only odd prime p such that p + sod(p) and p - sod(p) are square numbers (52 and 32, respectively). [Rivera]

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

+ 17 is the minimal prime solution as sum of three distinct triangular integers: 17=1+6+10 [Rivera]

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