MathDB

(2^a-2^b)/(2^c-2^d)

Source: ARO 2005 - problem 10.1

April 30, 2005

number theoryrepresentation

Problem Statement

Find the least positive integer, which may not be represented as

{2^a-2^b\over 2^c-2^d}

, where

a,\,b,\,c,\,d

are positive integers.