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Prime Factors
Factor an integer into primes.
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Factor an integer into primes. Runs in the browser. Nothing is uploaded.
About this tool
Enter an integer and see it written as a product of prime numbers. Prime factorization helps to simplify fractions, find the GCD and LCM, and check divisibility.
How to use it
- 01
Type the integer you want to factor.
- 02
Read the prime factorization.
- 03
Copy the result.
FAQ
Frequently asked questions
What is prime factorization?
Writing a number as a product of primes, such as 360 = 2³ × 3² × 5. Every integer above 1 has exactly one such form.
How large can the number be?
Large integers are factored exactly, though numbers with two very large prime factors take longer.