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Prime numbers

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.

Prime number check: (min 2; max 253 )
Show the prime number at position: (min 1; max 1000000)
Show the position of prime number: (min 2; max 15485863)
Find closest prime number: (min 2; max 15485863)
Calculate prime factors: (min 2; max 253 )
Background

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.

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