Prime Number Tools
NewCheck if a number is prime, find primes up to N, prime factorization, and nearest prime finder.
Prime number utilities
Prime Number Tools
Check if a number is prime, find primes up to N, prime factorization, and nearest prime finder.
Prime check
Check whether a number is prime.
Prime factorization
Factorize any positive integer.
Neighboring primes
Find the previous and next prime around a number.
Prime list
0Frequently Asked Questions
What does the Prime Number Tools do?
The Prime Number Tools performs prime calculations entirely in your browser. It handles a wide range of numeric inputs and is designed for both speed and accuracy.
How accurate are the results from Prime Number Tools?
The tool uses JavaScript's 64-bit IEEE 754 double-precision floating-point arithmetic, providing 15–17 significant decimal digits of precision — sufficient for most scientific and engineering applications.
What number formats does Prime Number Tools support?
The tool accepts integers, decimals, fractions, and scientific notation. Results are clearly formatted and can be copied as plain numbers or in exponential notation.
Can I use Prime Number Tools for educational purposes?
Yes. Where applicable the tool displays step-by-step breakdowns, making it useful for students learning mathematical concepts or verifying homework calculations.
Is Prime Number Tools free?
Yes, completely free with no limits or sign-up required. All calculations run locally in your browser with no data sent to any server.