Factor Samurai and Prime Smash!

Here are two apps that could provide students with fluency practice on factoring and prime numbers. The object of both games is to break each number apart until there are only prime numbers left, either by a samurai sword or smashing the numbers with your finger. Both the apps are free at this time.

Factor Samurai (FREE)

Below is a screenshot of "How to Play" Factor Samurai.

Prime Smash (FREE)

Below is the screenshot for "How to Play" Prime Smash!