Brain Training Games
Train your brain with a number puzzle backed by cognitive science.
Research shows that regular engagement with number puzzles is associated with sharper cognitive function. A study published in the International Journal of Geriatric Psychiatry found that adults who regularly solve number puzzles have cognitive function equivalent to people 8 years younger. Prime 59 is the brain training game that combines this cognitive benefit with genuine fun — five difficulty levels that grow with you, daily challenges to build a habit, and competitive multiplayer to keep you motivated. It’s brain training that doesn’t feel like homework.
How It Works
Three steps to your first solve.
Pick Your Difficulty
Choose from Easy to Master — five levels that scale to match your skill.
Fill the Grid
Place prime numbers so every row and column sums to exactly 59.
Beat the Clock
Faster times earn higher scores. Compete on leaderboards or battle friends live.
Everything You Need
Prime Numbers Only
Use 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31 to fill the grid.
5 Difficulty Levels
Easy to Master — from relaxing warm-ups to serious brain challenges.
Daily Challenge
A new puzzle every day, the same for every player worldwide.
Multiplayer Battles
Race friends or random opponents in real-time 1v1 puzzle races.
Global Leaderboards
ELO ratings, daily rankings, and per-difficulty leaderboards.
32 Languages
Play in your language — available in 32 languages worldwide.
Frequently Asked Questions
Ready to Play?
Download Prime 59 for free and start solving. Available on iOS, Android, and the web.