Welcome to the world of Factor Crafter, where elemental stones obey the laws of multiplication. Prime numbers form the basic elements, and can be combined together to create composites.

Fill up your almanac as you multiply Prime gems and factor Composite stones.

Features: 40 levels, an almanac of 100 stones, Sandbox mode, and Endless mode.

Topics: Multiplication, factorization, Lowest Common Multiples, Greatest Common Factors, logarithms, and variables.

Accessibility: Sound is optional. No time limits. Mouse-only. Strong English-reading ability is recommended.

U.S. Standards: This game covers most of common core standard CCSS.Math.Content.4.OA.B.4 (4th grade), CCSS.Math.Content.6.NS.B.4  (6th grade), introductory algebra concepts (8th grade), and simple logarithms (11th grade). It is great for middle school students just learning about factors and multiples, and is also for high school and college students who want a better understanding of exponents and logarithms.

Credits: Design and programming by Jeremy Hoffman (hoffman.jeremy98 [at] gmail.com). Graphics by Tristan Paul (tristan.g.paul [at] gmail.com). SFX from soundeffectsplus.com, pacdv.com, and soundimage.org.

Install Instructions:

WebGL (Browser, Chromebook) Extract files, then open "index" file to run in web browser. [This has not been tested on Chromebooks, but it probably works.]

Windows PC: Extract files, then open "Factor Crafter" executable file to run.

Android: As this game is not purchased from an app store, you may be warned that the file is "not from an authorized source", or "potentially unsafe". You may need to  edit your settings to "install apps from unknown sources". The installable .apk file is typically stored in your "Downloads" folder. Do a web search for 'install apk on [your Android device]' for more information.


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Click download now to get access to the following files:

Factor Crafter 1.03 for Android.apk 39 MB
Factor Crafter 1.0.3 for WebGL (download and play in browser).zip 21 MB

Development log


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Deleted 34 days ago

Thank you! Glad you enjoyed it! I'm currently working an adventure/card game set in the same universe, though it could take a while.

I'm already excited!!!  Have a great day.