The two most signficant number theory ones are considered solved: Quasi-Riemann and no Landau-Siegal zeros. Quanta has an article (https://www.quantamagazine.org/ai-proved-the-quasi-riemann-h...) reporting that experts agree that the Quasi-Riemann Hypothesis has been proven. The "no Landau-Siegal zeros" proof already has several manuscripts giving expositions of the proof.