Priemgetalle is getalle wat net deur hulself en 1 gedeel kan word. Die getal 3 is byvoorbeeld 'n priemgetal, maar 4 is nie (want 4 kan deur 2 gedeel word). Dink so daaraan: die priemgetal-families is baie klein, want daar is net twee familielede! Dis net die getal sélf, en 1. Jy kan nie enige ander getalle daar inpas sonder dat iets oorbly nie. 5 is so 'n eensame getal (net 5 × 1 = 5), maar jy kan sien dat 6 ook vir 2 en 3 in sy familie het (6 × 1 = 6, 2 × 3 = 6). Die getal 6 is dus nie 'n priemgetal nie. Gebruik die pyl-knoppies om om die bord te beweeg en die troggels te vermy. Druk die spasiebalk om 'n getal te vreet.
Prime numbers are numbers that are only divisible by themselves and 1. For example, 3 is a prime number, but 4 isn't (because 4 is divisible by 2). You can think of prime numbers as very small families: they only ever have two people in them! Only themselves and 1. You can't fit any other numbers into them with nothing left over. 5 is one of these lonely numbers (only 5 × 1 = 5), but you can see that 6 has 2 and 3 in its family as well (6 × 1 = 6, 2 × 3 = 6). So 6 is not a prime number. Use the arrow keys to navigate around the board and to avoid the Troggles. Press the spacebar to eat a number.