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Factorization practice. Complete the math factor tree to decompose the number at the top to its prime factors. Start at the top of the factor tree and fill in the correct factor wherever there is a blank. A branch will end if there is a primary factor. Use the mouse, TAB/SHIFT-TAB, or left and right arrow keys to move around the tree. When the tree is complete, press the white checkmark below the work area. Factors that are correct will turn green; factors that are incorrect will change to red. Correct the red numbers and press the checkmark again to see if you got the correct factors.

After all the factors are green, meaning they are all correct, press the reset icon or the ENTER or RETURN key to set a new problem.

The first ten prime factors are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.