Question

please tell what is prime factorisation method how to do it

Answer 1

A prime number (or a prime) is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself. However, 6 is composite because it is the product of two numbers (2 × 3) that are both smaller than 6.


The first way you can use a factor tree to find the factorization of a number is to divide out prime numbers only. Let's factor 24 using this method.

Since 24 is an even number, the first prime number that can be factored out is a 2. This leaves us with 2 * 12. Again, 12 is an even number, so we can factor out another 2, leaving us with 2 * 2 * 6. Since 6 is even, we can factor out a third two, leaving 2 * 2 * 2 * 3.