EntityQ282723· pop 13· linked from 28 articlesmultiplicative orderSign in to savemathematical functionConnectionsunitEntityInternational Standard Book NumberEntityintegerEntitynumber theoryEntityringEntitydivisorEntitycoprimeEntitymodular arithmeticEntitypigeonhole principleEntityEuler's totient functionEntityMathWorldEntityLagrange's theoremEntitycyclic groupEntityMaximaEntityWileyEntityEric W. WeissteinEntitydiscrete logarithmEntityprimitive root modulo nEntitywithout loss of generalityEntityorderEntityCategoriesModular arithmetic