Primes / Is 347 prime?

Is 347 a Prime Number?

Yes

347 is prime: for 347, testing every prime up to √347 ≈ 18.6 (namely 2, 3, 5, 7, 11, 13, 17) finds no divisor. 347 sits between primes 337 and 349, 10 below and 2 above. 347 shares no factor with 2-12; 347's divisors start beyond that range. 347 is odd, digit sum 14 for 347, digital root 5 for 347. 347 has 4 primes within 10 of 347.