Keep Prime Numbers is a free Racing game you can play instantly in your browser, with no download and no registration. How to play: Mouse click Touch. It renders at 800 by 480 pixels and scales to your window. It joined SaGo Games on October 26, 2024. It is an HTML5 build, so it loads in any modern desktop or mobile browser.
Remove all the blocks to make the composite number going out but keep the prime number. Click or tap the unused block to drop the composite numbers.