Searching for primitive roots in finite fields

Author:

Shoup Victor

Abstract

Let GF ( p n ) {\text {GF}}({p^n}) be the finite field with p n {p^n} elements, where p is prime. We consider the problem of how to deterministically generate in polynomial time a subset of GF ( p n ) {\text {GF}}({p^n}) that contains a primitive root, i.e., an element that generates the multiplicative group of nonzero elements in GF ( p n ) {\text {GF}}({p^n}) . We present three results. First, we present a solution to this problem for the case where p is small, i.e., p = n O ( 1 ) p = {n^{O(1)}} . Second, we present a solution to this problem under the assumption of the Extended Riemann Hypothesis (ERH) for the case where p is large and n = 2 n = 2 . Third, we give a quantitative improvement of a theorem of Wang on the least primitive root for GF ( p ) {\text {GF}}(p) , assuming the ERH.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,Computational Mathematics,Algebra and Number Theory

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