Funding for this research was provided by:
Received: 23 November 2020
Accepted: 9 February 2021
First Online: 22 March 2021
: The authors thank the Max-Planck-Institute for Mathematics in Bonn for an invitation in 2020 to present first results in the Number Theory Seminar. The feedback of the audience had significant influence on the final results of the paper. We thank the two reviewers for helpful comments and suggestions and the journal Research in Number Theory for the professional publication process.