Indeetools
Number Theory Calculators
Explore properties and relationships of numbers
Prime Number Checker
Check if a number is prime and see its factors. A prime number has exactly two distinct positive divisors.
Enter a number to check
Enter any positive whole number (up to 1,000,000)
Show all factors
Show explanation
Reset Calculator
Result
Enter a number above to check if it's prime
About Prime Numbers
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Examples of prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23... Key characteristics: • Must be greater than 1 • Has exactly two distinct positive divisors • Cannot be formed by multiplying two smaller natural numbers • The only even prime number is 2
Related Pages
Counting
Sequence
Arithmetic Sequence Calculator
Factorial Calculator
Combination Calculator
Probability
Related Calculators
Counting Calculators
Factoring Tools
Number Conversion Tools