Difficult mathematical problems are essentially quantum geometry problems in the Modified Einstein Spherical (MES) Universe. This work fulfills Hilbert’s dream of a unified mathematical universe. Based on geometric first principles, we resolve all seven Millennium Prize Problems by demonstrating they emerge as geometric consequences of MES cosmology. Under the MES Axiom "All physics is geometry," the entire spacetime curvature dictates particle masses, fluid turbulence, number theory, and computational complexity. Forest as a Quantum-Geometric Entity provides empirical validation, Geometric Langlands Conjecture and MES cosmology form a self-validating loop, establishing MES cosmology as the first Complete Theory of Everything.