Is M 31 a prime number?

Answer 1

Because it has no divisors other than itself and one. That is the definition of a Prime number.

Answer 2

No.

It's divisible by a million: 31 million = 31 x 1 million.

Along with being divisible by 10, 100, 1000, 10000, 100000 amongst others.

Answer 3

Yes, 31 is a prime because it can only be divided by 1 and itself.

Answer 4

On its own 31 is a prime number because it only has two factors which are itself and one

Answer 5

Yes.

Answer 6

Yes.