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Let $G$ be a finite group and $\psi(G) = \sum_{g \in G} o(g)$, where $o(g)$denotes the order of $g \in G$. First, we prove that if $G$ is a group of order$n$ and $\psi(G) >31\psi(C_n)/77$, where $C_n$ is the cyclic group of order$n$, then $G$ is supersolvable. This proves a conjecture ofM.~{T\u{a}rn\u{a}uceanu}. Moreover, M. Herzog, P. Longobardi and M. Maj putforward the following conjecture: If $H\leq G$, then $\psi(G) \leqslant \psi(H)|G:H|^2$. In the sequel, by an example we show that this conjecture is notsatisfied in general.

On Two Conjectures about the Sum of Element Orders