Primes / Is 101 prime?

Is 101 a Prime Number?

Yes

101 is prime: for 101, testing every prime up to √101 ≈ 10.0 (namely 2, 3, 5, 7) finds no divisor. 101 sits between primes 97 and 103, 4 below and 2 above. 101 shares no factor with 2-12; 101's divisors start beyond that range. 101 is odd, digit sum 2 for 101, digital root 2 for 101. 101 has 5 primes within 10 of 101.