Touch, Smash, and Remember prime numbers the fun way!

Prime numbers - numbers that have only two divisors, 1 and itself.
Panasonic Prime Smash! is a new type of game that enables a fun way to learn prime numbers, the mystic numbers also known as the “atom of numbers”

“RiSuPia” Official Application

How to play
If the number on balls flying in the air is a prime number, then “touch” it to earn points. If not, then “smash” it to divide the number until it becomes a prime number, and then “touch” it.
As you go through the games, the speed, the number and digit number of the balls change and increase the difficulty of the game.
Earn more points with continuous tricks and particular number combinations!

- Simple rules and a new feeling “smash” gesture
- Multi-touch interaction for multiple players to enjoy the game with both hands
- “Fun Facts” contents to deepen your knowledge of prime numbers
- Game Center support with leaderboards! Compare your scores with people all over the world!

What is “RiSuPia”?
The beauty of arithmetic and mathematics hidden in nature. The fun in natural science in daily life. RiSuPia is a hands-on museum that enables you to experience the fascination of science of mathematics.

RiSuPia: Tokyo, Japan / Hanoi, Vietnam

What’s New

Version 2.0.9

- Compatible with iOS 14
- Adjust the number of divisors that appear at one time

Ratings and Reviews

4.7 out of 5
160 Ratings

160 Ratings

BWteacher ,

Thank you!!!

I am so thankful that PrimeSmash has been updated for the new iOS. My math students have 1:1 iPads but missed out last year without it, and PrimeSmash is such a help with factoring! Students love playing and make connections when problems require factoring. I’m a really excited middle school math teacher right now!!!

CutieCakes91 ,


Hi, I got this game for eSpark and it really helped me get 100% on my test and my teacher actually told me it was one of my best videos I've done

Thanks for the Achievement, Panasonic

theextreme⚜️🔱 ,

the pug

it is fun and it helps you learn

AKA my favorite type


Panasonic Corporation
170.1 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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