Prime Number Checker
Verify if a number is prime, view factorizations, find adjacent primes, or list primes in a range.
367
✓ Yes, This is a Prime Number!
It is only divisible by 1 and itself.
Adjacent Primes
Previous Prime359
Next Prime373
Nearest Primes Sequence
353
→359
→367
→373
→379
Prime Numbers and Factorization
A prime number is a whole number greater than 1 whose only divisors are 1 and itself — 2, 3, 5, 7, 11, and so on. Every other whole number is composite and can be written as a unique product of primes (its prime factorization), for example 360 = 2³ × 3² × 5. This checker tests divisibility up to the square root of your number, which is fast and exact for values up to a trillion.
Related math tools: the GCD & LCM Calculator, the Number to Words Converter, and the Scientific Notation Converter.
Private & free — this tool runs entirely in your browser.
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