What Are Prime Numbers?
Learn about prime numbers — and play a game built entirely around them.
Prime numbers are natural numbers greater than 1 that can only be divided evenly by 1 and themselves. The first few primes are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31 — and these are exactly the numbers used in Prime 59. Prime numbers are the building blocks of all mathematics: every whole number can be expressed as a product of primes (the Fundamental Theorem of Arithmetic). They’re used in cryptography, computer science, and number theory. And now, they’re the stars of a puzzle game that makes learning primes genuinely fun.
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.