Method
Repeatedly divide the whole number by the smallest possible prime until the remaining value is prime.
Example
360 = 2 × 2 × 2 × 3 × 3 × 5.
Limits
Check inputs and units. Important academic, financial or professional decisions should be confirmed against an appropriate source.
Common questions
What does the prime factor calculator calculate?
Break a positive whole number into prime factors.
Does this prime factor calculator show its method?
Yes. The result includes the central formula or working needed to check the answer.
Are my values uploaded?
No. The calculation runs in this browser and does not require an account.