Prime Number Checker
Is it prime? List primes in a rangeRuns locally · nothing uploaded
- Prime?✓ Prime
- Even or oddOdd
- Previous prime89
- Next prime101
Also works as:is it primeprime number listprime generatorodd or even
How to use
- 1Choose checker or generator.
- 2Enter a number or a range.
- 3Read the result or copy the prime list.
FAQ
What is a prime number?
An integer greater than 1 divisible only by 1 and itself, such as 2, 3, 5, 7, 11. 1 is not prime.
Does it work for large numbers?
Yes. It uses the Miller–Rabin test, which handles numbers with dozens of digits instantly.
Is 2 a prime number?
Yes. It is the only even prime.
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