The only positive integer factors of 31 are 1 and itself, therefore, it is prime.
A Prime number is defined as a number with only factors of 1 and itself. With this definition, 31 is a prime number because the only factors of 31 are 1 and 31.
31 is a Prime Number.
31 is a prime number because it has only two factors which are itself and one.
31 is PRIME.
4 is composite, 31 is prime.
31 and 61 are prime, the rest composite.
31 and 47 are prime, the rest composite.
31 is a prime number because it has only two factors which are itself and one
An integer greater than 1 can be composite or prime but not both. So 31 cannot be a composite prime.
31 is PRIME.
31 is prime.
31 is prime. 32 and 33 are composite.
31 is prime.
4 is composite, 31 is prime.
31 is a prime number.
31 is prime.
31 is prime.
31 is a prime number
31, 47 and 103 are prime. The rest are composite.
is 2 prime composite or square