Grade levels 

Factorization Forest – A Prime Factorization Game




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Printable, Fun Worksheets for This Game


Age Appropriateness


Factorization Forest is appropriate for students ages 9 and up

Factorization Forest is a game in which students can practice their prime factorization skills. Students can choose to build a forest without a timer using their prime factorization skills, or, can play a game in which they try to populate a river valley with as many trees as possible in three minutes using their prime factorization skills.To play, choose the game type and select the type of tree you would like to grow. Then, turn your attention to the number that appears at the top of the screen. This will be the number you will “factorize”. Click the ” + ” button to begin building your factor tree. Continue clicking the ” + ” buttons that appear until your are left with only prime numbers. Then, count of the prime numbers to form your factorization. To type in your factorization, find the space toward the bottom of the screen in which you can enter a number and use the ” + ” to enter other numbers. Use the dotted lines positioned to the upper right of each number to specify exponents. When you are satisfied with your factorization, click the ” ? ” button. If you are correct, you will see your tree grow. If you are playing the create a forest version of the game, you can move your tree to any place on the picture. If you are playing the timed version, the tree will remain in a fixed position.

Scoring Breakdown and Grade Level Equivalency


Trees formed Grade Level Equivalency (+ , and -)
3 4.2
4 4.6
5 5.0
6 + 5.4 (mastery)


Skills Reinforced:

Prime Factorization
Prime and Composite Numbers
Multiplication an Division





Factorization Forest is Available on Total Access Math for MrNussbaum XTEND

Total Access Math Program for MrNussbaum XTEND – $25.00 Per Year Per Classroom/$10.00 Per Year Per Homeschooling Family

  • Program appropriate for grades 1-6
  • 40 of the best Math Games and associated online practice modules and printable worksheets
  • Hits hundreds of standards
  • Comes with instructional videos and lesson plans (in some cases). No having to “figure stuff out.”
  • Includes advanced recording metrics to gauge student progress, mastery, place in class, and grade level equivalencies
  • Awesome to use as rewards in the classroom. Deploy games/activities to your entire class or to individual students
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