About this game

Primes is a quick number-sorting game based on prime numbers. Two kinds of balls fall, one printed with 7 and the other with 9. They must be collected in bowls: one bowl holds prime-numbered balls and the other holds non-prime ones, and the bowls swap places when you hold and release the mouse. Since 7 is prime and 9 is not, the challenge comes from keeping track of which bowl is currently in which position while the balls keep falling. The game is played with the mouse in a horizontal layout in a desktop browser. Rounds are short and easy to restart. Tip: remember that 7 is prime and 9 is not, and glance at the bowl positions before each ball arrives, swapping early rather than at the last moment.

If it clicks with you, Funny Prank Sounds, Hot Chats with Girls and Cooking Clash are close in spirit.