Prime Number Checker
Check if a number is prime, find prime factors, or list primes in a range
Result
17
is a prime number
Type
Odd
Sign
Positive
Digits
2
First 100 Prime Numbers
About Prime Numbers
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
The first few prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29...
2 is the only even prime number. All other even numbers are divisible by 2.
The Fundamental Theorem of Arithmetic states that every integer greater than 1 can be uniquely represented as a product of prime numbers.