So, What Is a Prime Number?
Every prime number is a positive whole number that has only 2 and no more divisors – the number itself and the number ” 1 “. This is the most simple definition! To understand it even better, please check the following examples:
3 is a prime number, it is positive and round and it can be divided by only two numbers – 3 and 1
9 is NOT a prime number – can be divided by 1,3 and 9
11 is a prime number – can be divided by only 11 and 1
To learn more about primes, you can see the site: what is a prime number and read some nice stuff on this topic.
Is 1 prime number?
The answer is NO, because it has only one divisor: 1
Which Is The Only One Even Prime Number?
The answer of this questions is 2. As you know, every even number can be divided by 2 and every number can be divided by 1 and itself. This way for every even number, except 2 we have 3 divisors. 2 has only 2 – 1 and itself and that’s why it’s prime.
To see all prime factors of a number, or check a number if it’s prime or not, you can use the following calculator. Just type it and hit the button.
Enter any number to see its prime factors: