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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…