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Let $G$ be a simple group of order $p^{2}-1$ where $p$ is Mersenne prime.
I am looking for get a contradiction when $p\mid |Aut(G)|$. Does anyone knows how we can get a contradiction? Thanks.
Let $G$ be simple group of order $p^{2}-1$ where $p$ is Mersenne prime.
I am looking for a contradiction when $p\mid |Aut(G)|$. Does anyone knows how we can get a contradiction? Thanks.