素楽

Navigate a maze filled with numbers, stepping only on prime number squares.

The rules are simple, but your ability to identify prime numbers will be tested.

【How to Play】
Identify prime numbers from the numbers arranged on the grid and connect them from the start (top left) to the goal (bottom right). Stepping on a composite number results in a mistake. Aim for the shortest route and the fastest completion.

【5 Difficulty Levels】
・5x5 (2-49) — Start here
・7x7 (2-79) — Hone your prime number sense
・10x10 (2-99) — Challenge the two-digit wall
・15x15 (2-149) — Three-digit prime numbers appear
・20x20 (2-299) — The most difficult maze

【Daily Maze】
One maze is presented daily, common to all players. Extend your streak by clearing mazes consecutively.

[Maze Pack]
* Twin Primes — A special maze where you track down twin prime pairs of (p, p+2)
* Mersenne Numbers — An advanced maze where you must uncover the 2ⁿ-1 type trap
* Giant Primes — A maze testing your ability to determine the primeness of three-digit numbers

[Boss Battle]
A boss appears every 5 levels. Use the prime numbers you've collected as weapons to factorize composite numbers and defeat them. There's also a prime number determination speed battle.

[Online Ranking]
Register a nickname and compete with players nationwide. Four types of rankings are supported: by size, overall, rank score, and daily. Participation is optional and only valid if you agree. Signing in with Google allows you to carry over your score even after changing devices or reinstalling the app.

[Replayability Features]
• 5-level ranking system (S-D)
• 32 achievement badges
• 117 prime number collection encyclopedia
• Online rankings by size, overall, run score, and daily
• Track statistics and best records

Enjoy the world of prime numbers while naturally improving your mathematical skills.

Perfect for brain training during commutes or school breaks, and a great way for math enthusiasts to pass the time.