Prime Number Counter

Math Tools

Find prime numbers in a range or check if a specific number is prime. Perfect for mathematical analysis, cryptography, and number theory studies.

Find Prime Numbers in Range

Enter a range to find all prime numbers within it

Start Number

End Number

Check Single Number

Check if a specific number is prime

Enter Number

What are Prime Numbers?

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Examples: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29...

Note: 2 is the only even prime number

Famous Primes

Smallest prime: 2

First 10 primes: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

Twin primes: Pairs that differ by 2 (e.g., 3&5, 5&7)

Mersenne primes: Form: 2^p - 1

Applications

• Cryptography and security

• Computer science algorithms

• Mathematical research

• Number theory studies