"Mih\u0103ilescu's theorem" . . . . . . . . "Catalan\u2013Dickson conjecture on aliquot sequences" . "Catalan conjecture" . . "Catalan's conjecture" . "Catalan's Mersenne conjecture" . . . "Catalan's conjecture" . . . . "Catalan's conjecture#Pillai's conjecture" . . . . .