Primes / Is 17 prime?

Is 17 a Prime Number?

Yes

17 is prime: for 17, testing every prime up to √17 ≈ 4.1 (namely 2, 3) finds no divisor. 17 sits between primes 13 and 19, 4 below and 2 above. 17 shares no factor with 2-12; 17's divisors start beyond that range. 17 is odd, digit sum 8 for 17, digital root 8 for 17. 17 has 6 primes within 10 of 17.