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arXiv · 1103.3578

Cullen Numbers with the Lehmer Property

Jose Maria Grau·Florian Luca
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Abstract

Here, we show that there is no positive integer $n$ such that the $n$th Cullen number $C_n=n2^n+1$ has the property that it is composite but $ϕ(C_n)\mid C_n-1$.

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Jose Maria Grau, Florian Luca. 2011-03-18. Cullen Numbers with the Lehmer Property. https://arxiv.org/abs/1103.3578

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