Is 1 a Prime Number?
1 is not a prime number by mathematical definition, as it has only one divisor.
How to use this tool
- Enter number in the fields above.
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- Read your result and the full breakdown beneath it.
By convention, 1 is not considered a prime number because it does not have exactly two distinct divisors.
Frequently asked questions
- What is a prime number?
- A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.