A <a href='https://en.wikipedia.org/wiki/Prime_number'>**prime number**</a> is a natural number that is greater than one *(>1)* that cannot be formed by multiplying two smaller natural numbers. One of the most popular use of prime numbers in information technology is public-key cryptography.
The recommended calculator for activities involving prime numbers is CalculatorSoup® <a href='https://www.calculatorsoup.com/calculators/math/prime-number-calculator.php'>Prime Number Calculator</a>. The features of this calculator include:
- Finding whether a number is prime or <a href='https://en.wikipedia.org/wiki/Composite_number'>composite</a>
