On the composite Lehmer numbers with prime indices, I

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
A. Schinzel
Keyword(s):  
1982 ◽  
Vol 40 (4) ◽  
pp. 369-373 ◽  
Author(s):  
Kalman Győry
Keyword(s):  

1963 ◽  
Vol 8 (2) ◽  
pp. 251-257 ◽  
Author(s):  
Andrzej Schinzel
Keyword(s):  

1955 ◽  
Vol 62 (2) ◽  
pp. 230 ◽  
Author(s):  
Morgan Ward
Keyword(s):  

Integers ◽  
2012 ◽  
Vol 12 (5) ◽  
Author(s):  
José María Grau ◽  
Antonio M. Oller-Marcén

Abstract.Lehmer's totient problem consists of determining the set of positive integers


2013 ◽  
Vol 211 (2) ◽  
pp. 291-314 ◽  
Author(s):  
Cameron L. Stewart
Keyword(s):  

2010 ◽  
Vol 54 (1) ◽  
pp. 55-65 ◽  
Author(s):  
Javier Cilleruelo ◽  
Florian Luca

AbstractA Lehmer number is a composite positive integer n such that ϕ(n)|n − 1. In this paper, we show that given a positive integer g > 1 there are at most finitely many Lehmer numbers which are repunits in base g and they are all effectively computable. Our method is effective and we illustrate it by showing that there is no such Lehmer number when g ∈ [2, 1000].


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