Primes / Is 149 prime?

Is 149 a Prime Number?

Yes

149 is prime: for 149, testing every prime up to √149 ≈ 12.2 (namely 2, 3, 5, 7, 11) finds no divisor. 149 sits between primes 139 and 151, 10 below and 2 above. 149 shares no factor with 2-12; 149's divisors start beyond that range. 149 is odd, digit sum 14 for 149, digital root 5 for 149. 149 has 4 primes within 10 of 149.