Helmut Maier was born in Geislingen/Steige, Germany, on October 17, 1953. He graduated with a Diploma in Mathematics from the University of Ulm under the supervision of Professor H.E.Richert. After a period as a scientific employee he started his doctoral studies at the University of Minnesota and received his Ph.D. in 1981 under the supervision of Professor J.Ian Richards. After postdoctoral positions at the University of Michigan and the Institute for Advanced Studies he accepted a tenure track position at the University of Georgia, where he collaborated with Professor Carl Pomerance. In 1993 he accepted a position as a Professor at the University of Ulm. Since 2019 he is retired and has a position as a Senior Professor at the University of Ulm.Jörn Steuding (*1969) studied and received his doctorate in Hanover in 1999, habilitated in Frankfurt am Main in 2004 and was subsequently investigador Ramón y Cajal at the Universidad Autónoma de Madrid. Since 2006 he is professor of number theory at the University of Würzburg. His research deals mostly with topics in analytic number theory; however, there is also interest in cryptography, graph theory and the history of mathematics.Rasa Steuding (*1975) studied and received her doctorate in Vilnius in 2002, and was subsequently a lecturer in Siauliai, a postdoc at the Universidad Autónoma de Madrid, and a lecturer at the RheinMain University of Applied Sciences. Her research interests are analytic number theory and cryptography. Since 2006 she is associated with the number theory group at Würzburg.