# The denominators of harmonic numbers

11 Jul 2016 Shiu Peter

The denominators $d_n$ of the harmonic number $1+\frac12+\frac13+\cdots+\frac1n$ do not increase monotonically with~$n$. It is conjectured that $d_n=D_n={\rm LCM}(1,2,\ldots,n)$ infinitely often... (read more)

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• NUMBER THEORY