This tool has several functions regarding prime numbers. It is possible to test whether a number is a prime number or to find the closest prime number. It is also possible to calculate the prime factors of a number.
The first 1 million prime numbers are included in this tool, so the largest prime number in this tool is: 15485863.
A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. The smallest prime number is 2, since its only divisors are 1 and 2.