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On Composite Odd Numbers k for Which 2ⁿk is a Noncototient for All Positive Integers n

Journal of Integer Sequences, Volume 24, No. 9, Article 21.9.6, Year 2021

We provide some results relating Riesel numbers with families of cototients and noncototients.

González, Marcos J.
1. Venezuela, Caracas Universidad Simón Bolívar
Mendoza, Alberto
1. Venezuela, Caracas Universidad Simón Bolívar
Luca, Florian
1. South Africa, Johannesburg University of the Witwatersrand
2. Saudi Arabia, Jeddah King Abdulaziz University
Huguet, V. Janitzio Mejía
1. Mexico, Azcapotzalco Universidad Autónoma Metropolitana - Azcapotzalco

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