On the number of nonquadratic residues which are not primitive roots

Florian Luca, and P. G. Walsh. "On the number of nonquadratic residues which are not primitive roots." Colloquium Mathematicae 100.1 (2004): 91-93. <http://eudml.org/doc/283653>.

@article{FlorianLuca2004,
abstract = {We show that there exist infinitely many positive integers r not of the form (p-1)/2 - ϕ(p-1), thus providing an affirmative answer to a question of Neville Robbins.},
author = {Florian Luca, P. G. Walsh},
journal = {Colloquium Mathematicae},
keywords = {primitive root; quadratic nonresidue},
language = {eng},
number = {1},
pages = {91-93},
title = {On the number of nonquadratic residues which are not primitive roots},
url = {http://eudml.org/doc/283653},
volume = {100},
year = {2004},
}

TY - JOUR
AU - Florian Luca
AU - P. G. Walsh
TI - On the number of nonquadratic residues which are not primitive roots
JO - Colloquium Mathematicae
PY - 2004
VL - 100
IS - 1
SP - 91
EP - 93
AB - We show that there exist infinitely many positive integers r not of the form (p-1)/2 - ϕ(p-1), thus providing an affirmative answer to a question of Neville Robbins.
LA - eng
KW - primitive root; quadratic nonresidue
UR - http://eudml.org/doc/283653
ER -