Prime Number Checker
Check if a number is prime or composite
Enter a number to check if it's prime
About Prime Numbers
What are Prime Numbers?
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
Properties:
- Only divisible by 1 and itself
- Always odd except for 2
- Infinite in number
- Fundamental building blocks of numbers
First 20 Prime Numbers:
2
3
5
7
11
13
17
19
23
29
31
37
41
43
47
53
59
61
67
71