Primes / Is 103 prime?

Is 103 a Prime Number?

Yes

103 is prime: for 103, testing every prime up to √103 ≈ 10.1 (namely 2, 3, 5, 7) finds no divisor. 103 sits between primes 101 and 107, 2 below and 4 above. 103 shares no factor with 2-12; 103's divisors start beyond that range. 103 is odd, digit sum 4 for 103, digital root 4 for 103. 103 has 6 primes within 10 of 103.