Games Like Kakuro
If you love Kakuro’s sum-based puzzles, Prime 59 is your next obsession.
Kakuro is often called “crossword meets Sudoku” because you fill a grid with numbers that must sum to specific targets without repeating digits. Prime 59 shares that sum-based DNA but takes it in a new direction: instead of varying target sums, every row and every column targets the same number (59), and you work exclusively with prime numbers. If you enjoy the mathematical satisfaction of finding number combinations that hit a target sum, Prime 59 will feel instantly familiar — and endlessly fresh.
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.