FAQ: Prime Number Checker
1. What is a prime number?
A prime number is a natural number greater than 1 with no positive divisors other than 1 and itself (e.g., 2, 3, 5, 7).
2. How does the checker work?
It checks divisibility from 2 to the square root of the number. If no divisors, it's prime.
3. Can I check large numbers?
Yes, but very large numbers may take time due to browser limits.
4. Is 1 a prime number?
No, 1 is not prime (nor composite) by definition.
5. What about negative numbers?
Primes are positive integers greater than 1; negatives aren't considered prime.
6. Why are primes important?
In USA education and tech, primes are key in cryptography, math, and computer science.
7. Is my data private?
Yes, checks are done in your browser—no data is stored or sent.