Enter your keyword

Prime Number Formula

When a number is divisible by only one and itself, then it is a prime number. The prime numbers cannot be factorised as they are not divisible. The divisible numbers are called composite numbers. 1 is neither prime nor composite.

How do we get to know if a number is prime or not?

To calculate we need to find the factors of the number. Take for example 11, 11 is divisible only by 1 and itself. Since it has only two factors, it is a prime number.

Solved Example.

Question 1: Find if 53 is a prime number or not ?


The factors of 53 are 1 and 53.
So 53 is only divisible by 1 and 53.
So, 53 is a prime number.

Question 2: Check if 64 is a prime number or not?

Solution. The factors of 1, 2, 4, 16, 8.
Hence it is a composite number and not a prime number.

Related Links
Inverse Hyperbolic Functions FormulaCondensed Structural Formula
Periodic FormulasRate Of Decay Formula
Basic Math FormulasDoppler Effect Formula
Daily Compound Interest FormulaFroude Number Formula
Binomial Probability FormulaAverage Speed Formula
Byjus Formulas