Primes / Is 47 prime?

Is 47 a Prime Number?

Yes

47 is prime: for 47, testing every prime up to √47 ≈ 6.9 (namely 2, 3, 5) finds no divisor. 47 sits between primes 43 and 53, 4 below and 6 above. 47 shares no factor with 2-12; 47's divisors start beyond that range. 47 is odd, digit sum 11 for 47, digital root 2 for 47. 47 has 5 primes within 10 of 47.