Prime Shooter is a math game of prime numbers created by Philip Dorrell. Press [P] to destroy prime numbers directly but to fire a 2, 3, 5 or 7, just type the corresponding key on the keyboard. To fire 11, 13, 17 or 19, type the first letter of the number (in lower case), i.e. "e" for 11, "t" for 13, "s" for 17 and "n" for 19. Type "p" (lower case) to fire the "P" missile. In all cases a number is "dead" when it is reduced to 1. If a number hits you, then you're dead.