Category: number theory Algebraic and transcendental numbersFactorialsGreatest common divisor (GCD) of two numbersLowest common multiple (LCM) of two numbersPrime factors of a numberRoot 2 is irrational - proof by prime factorsRoot 2 is irrational - proof by the carpets theoremThe golden ratioTrinary numbers Join the GraphicMaths Newsletter Want article discussions, announcements, and discounts on GraphicMaths books and products? Join the newsletter: