  In minimal supersymmetric SU(5) models, the proton can decay through
dimension 5 operators. Since this decay depends directly on the supersymmetric
soft masses, it will be constrained by other observables which depend on the
soft masses, such as the Higgs mass and the dark matter relic density. In this
work, we will examine the upper limit on the proton lifetime in minimal
supersymmetric SU(5) with constrained minimal supersymmetric (CMSSM) boundary
conditions set at the grand unification scale. We perform a random scan over
the variables of the (CMSSM), with of order $10^{6}$ points, and find that the
proton lifetime is within reach of JUNO and Hyper-Kamiokande's experiment.
