How do I find prime factors of a number?
Taking the number 30 as an example. We have to identify the lowest prime that 30 is divisible by, in this case 2. We perform 30 divided by 2 and get an answer of 15. We repeat the process with 15 and find the lowest prime it is divisible by, in this case 3. We perform 15 divided by 3 and get an answer of 5 which is also a prime. This means that 30 = 2 x 3 x 5. Visually you should use a prime factor tree to work this out for more complicated/larger numbers
Get an answer in 5 minutes from expert tutors at Oxford, Cambridge, Imperial and more.