3 papers
math.NT2026
Covering systems where the prime divisors of all moduli are only , , or
Joshua Harrington, Jonah Klein, Joshua Lowrance +1
We try to find all quadruples of positive integers with such that there exists a distinct covering system with minimum modulus and least common mu…
math.NT2025
A further investigation on covering systems with odd moduli
Chris Bispels, Matthew Cohen, Joshua Harrington +4
Erdős first introduced the idea of covering systems in 1950. Since then, much of the work in this area has concentrated on identifying covering systems that meet specific condition…
math.NT2025
On Sierpiński and Riesel Repdigits and Repintegers
Chris Bispels, Matthew Cohen, Joshua Harrington +4
For positive integers , , and , we say that an integer is a -repdigit if can be expressed as the digit repeated times in base-$b…