Integers with small digits in multiple bases
Number Theory
2025-09-04 v1 Combinatorics
Abstract
We show that, for any , if are distinct coprime integers, sufficiently large depending only on , then for any there are infinitely many integers such that all but of the digits of are in base for all . In other words, for any fixed large bases, there are infinitely many such that almost all of the digits of are small in all bases simultaneously. This is both a quantitative and qualitative improvement over previous work of Croot, Mousavi, and Schmidt. As a consequence, we obtain a weak answer to a conjecture of Graham concerning divisibility of .
Cite
@article{arxiv.2509.02835,
title = {Integers with small digits in multiple bases},
author = {Thomas F. Bloom and Ernie Croot},
journal= {arXiv preprint arXiv:2509.02835},
year = {2025}
}
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23 pages