Zaccagnini, Alessandro  
   University of Parma. Analytic Number Theory.
   http://www.math.unipr.it/~zaccagni/home.html

Zuniga-Galindo, Wilson  
   Barry University. Algebraic geometry, number theory, p-adic analysis.
   http://euclid.barry.edu/~zuniga/

Zhang Liang-Cheng  
   Southwest Missouri State University. Algebraic and analytic number theory.
   http://math.smsu.edu/~zhang/

Zhang Shou-Wu  
   Columbia University. Arithmetic algebraic geometry.
   http://www.math.columbia.edu/~szhang/

Zhu, Hui June  
   McMaster University. Arithmetic geometry.
   http://www.math.mcmaster.ca/~zhuh/

Zimmermann, Paul  
   INRIA Lorraine. Computer algebra, the arithmetic of Big Numbers, random generation of combinatorial structures and reliable computation.
   http://www.loria.fr/~zimmerma/

Zhang Zhenxiang  
   Anhui Normal University. Computational number theory, Integer factorization, Primality testing, Algorithms, Complexity. Papers, preprints.
   http://www.ahnu.edu.cn/~math/htm1/zzx.htm

Zhan Tao  
   Shandong University. Additive theory of prime numbers; Exponential sums over prime variables; Bombieri-Vinogradov type mean value theoreoms; Riemann Zeta function and Dirichlet L-functions.
   http://www.prime.sdu.edu.cn/third/07zhantao.html