Factoring calculator online to factor trinomials, polynomials and other expressions. Prime factorization calculators and widgets.

\lim_{x \to \infty} \exp(-x) = 0

f(n) = n^5 + 4n^2 + 2 |_{n=17}

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:

Some 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:

Enter the number:
Prime factors are:


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