Description

How many prime numbers do you Know?
2,3,5,7,11,13,17,19,23...........

This is the Simple game, which you judge the showed number is a prime number or not in 5 sec.

・If you answer correctly five straight question, level up to
next stage and question will become more difficult.
・if Correct answers of recent 10 questions is less than 5, Game is Over.

The range of prime numbers in this Game is between 2 and 1000,000.