MathDB
Math Prize 2011 Problem 4

Source:

September 19, 2011
logarithms

Problem Statement

If x>10x > 10, what is the greatest possible value of the expression (logx)logloglogx(loglogx)loglogx? {( \log x )}^{\log \log \log x} - {(\log \log x)}^{\log \log x} ? All the logarithms are base 10.