Prime Number Calculator
Result
What is a Prime Number?
A prime number is any integer, or whole number, greater than 1 that is only divisible by 1 and itself. In other words, a prime number only has two factors, 1 and itself.
Examples:
Prime Numbers:
- 2 - factors: 1, 2
- 3 - factors: 1, 3
- 5 - factors: 1, 5
- 17 - factors: 1, 17
Composite Numbers:
- 4 - factors: 1, 2, 4
- 6 - factors: 1, 2, 3, 6
- 8 - factors: 1, 2, 4, 8
- 51 - factors: 1, 3, 17, 51
Note: The number 1 is neither prime nor composite. The number 2 is the only even prime number - all other even numbers are composite because they have 2 as a factor.