MathDB
Problem 8 of Fourth round

Source: IX International Festival of Young Mathematicians Sozopol, Theme for 10-12 grade

September 22, 2018
number theorynumber theory unsolved

Problem Statement

Are there infinitely many positive integers that can’t be presented as a sum of no more than fifteen fourth degrees of positive integers. (For example 15 isn’t such number as it can be presented as the sum of 15.1415.1^4)