Any number that cannot be evenly divided by any Prime number smaller than itself is a prime number.
Chat with our AI personalities
If it only has two factors, it's a prime number.
13
x is a placeholder for a number. Depending what number you decide that x should be, it will be a prime number, or it won't.
1 is not a prime number because it can be evenly divided by itself and by 1, the opposite as per the definition of a prime number.
Whether a number is a prime number or not is determined by its factors. It is a prime number if its only factors are 1 and itself.