Primes / Is 5 prime?

Is 5 a Prime Number?

Yes

5 is prime: for 5, testing every prime up to √5 ≈ 2.2 (namely 2) finds no divisor. 5 sits between primes 3 and 7, 2 below and 2 above. 5 shares no factor with 2-12; 5's divisors start beyond that range. 5 is odd, digit sum 5 for 5, digital root 5 for 5. 5 has 6 primes within 10 of 5.