Free · Number playground

Prime Factor Tree Maker

Break a number into the small prime numbers that multiply to make it.

  • Clear, kid-friendly steps
  • Private in your browser
  • No signup

Number playground

Try your own numbers

Change the numbers, then press the button to see a clear answer.

Whole numbers work best here.

Number report

84 = 2 × 2 × 3 × 7

These whole numbers divide it with nothing left over.

2237

Powered by Fermat.ts, an open-source library available under MIT.

Three simple steps

How to use it

  1. Type one number, two numbers, or a short list.
  2. Press the big button to see the answer and a plain explanation.
  3. Copy the result, then try a new example.

Private by default

Your words and choices stay in this browser tab. There are no accounts, uploads, ads, or trackers inside the tool. Close the tab and the working data is gone.