The 2-modular characters of Conway's group Co2
Ibrahim A. I. Suleiman, Robert Arnott Wilson · Mathematical Proceedings of the Cambridge Philosophical Society · 1994
Abstract We use computational methods to find the irreducible 2-modular characters of Conway's second group. Three of these are produced by probabilistic methods, which means that we have very strong evidence that they are correct, but we do not yet have a complete proof.