**Prime Numbers**

Prime number is a number greater than "1" and is not divisible by any other number except 1 and itself. Prime numbers are positive whole numbers bigger than 1.**Prime Factors**

Every number can be written in the form of product of prime numbers. These numbers are called prime factors of that number. Every number has a unique set of prime factors.**For example:** 6 can be written as:**$6=2\times 3$**, where 2 and 3 are referred as prime factors of 6.**Prime Factorization**

The method of finding prime factors of a numbers is known as prime factorization. In other words, prime factorization is the technique of determining prime numbers which multiply together to give the required number.**Prime factorization method is illustrated below:****Step 1 :** Find a prime number by which the given number is divisible.**Step 2:** Divide the given number by that prime number and write down the result.**Step 3:** Now determine a prime number by which the result obtained (in step 2) is divisible. Divide it by that number.**Step 4:** Repeat this process until reach at 1.**Step 5:** All the prime numbers obtained in this process will be the prime factors of given number.**Let us understand prime factorization method by an example.****Example:** Evaluate prime factors of 384 using prime factorization method.**Solution:** The method is illustrated in the following figure:

Hence, prime factorization of 384 is:

$384=2\times 2\times 2\times 2\times 2\times 2\times 2\times 3$

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