Prime Number Checker
The Prime Checker determines primality and can factor integers, useful for math, crypto and teaching.
Key Features
- Primality test
- Factorization
- Large integer support
- Local only
Use Cases
- Verify a prime for crypto
- Factor a number
- Teach number theory
- Check a modulus
How to Use
- Enter the integer
- Test or factor
- Read the result
Practical Tips
- Trial division is fine for modest sizes
- Big integers need care
- 1 is not prime
FAQ
- Any size?
- Within practical limits of the browser.
- Why factor?
- Useful in crypto and math.