Hard Math Puzzles
Expert and Master difficulty — for players who want a real challenge.
If you’re bored by easy puzzles and want something that truly tests your mental limits, Prime 59’s Expert and Master modes deliver. Master difficulty gives you minimal pre-filled cells, a par time of 20 minutes, and requires deep strategic thinking about prime number combinations. The scoring system rewards both accuracy and speed, so there’s always room to improve. Add competitive multiplayer at these difficulty levels and you’ve got the hard math puzzle experience that serious puzzle players crave.
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.