# How to check whether N is a prime number?

Let’s play with prime

Wait…….!

# What is a Prime number?

A prime number is a whole number which is only divisible by the 1 and the number itself.

## Let’s see the conversation between prime numbers and consonant numbers.

**Prime number: **Hey..! consonant number.

**Consonant number:** Hey..! prime number. Can you tell who can divide you?

**Prime number:** The first natural number ‘1’ can divide me.

**Consonant number:** Wow! ‘1’ can divide me also. Can any other divide you?

**Prime number:** Not possible…….. Other than ‘1’ only I can divide my self.

**Consonant number:** That’s Great… Ok Bye … Prime number.

**Prime Number: **Bye..!

# Procedure to check Prime Number

**STEP 1: **Return *False*, if N = 0 or N = 1

**STEP 2:** Return *True*, if N = 2 or N = 5

**STEP 3: **Return *False*, if unit digit of N is ‘5’ or ‘0’. Use Bitwise operators to reduce calculation complexity.

**STEP 4: **Return *False*, if N is an Even Number.

**STEP 5: **Take the square root of N. If any of the prime numbers less than or equal to the Square root of N divides N properly, then return *False*. Else return *True*.

# Python Program

# C Program

Hurray…! Hope it will help you.