Learn how to work out the factors of a number using a diagrammatic representation and factor trees in this KS3 maths study guide from BBC Bitesize.

Prime Numbers: Check definition of prime numbers, list from 1 to 1000, examples, applications and frequently asked questions regarding prime numbers.

It’s quite another again to find the prime factors of a number fifty digits long. Though the best mathematicians have chewed on the problem for hundreds of years, there just doesn’t seem to be ...

Any number is the unique product of prime factors. Eratosthenes, who lived from -276 to -194, proposed a process that allows us to find all prime numbers less than a given natural number N.

The three smallest prime numbers are 2, 3 and 5. It's easy to find out if small numbers are prime—one simply needs to check what numbers can factor them.