It should add that this lifetime in the first part is assuming that proton is not stable. Proton is a stable particle in standard model. Also, 1.67×10^32 is no

It should add that this lifetime in the first part is assuming that proton is not stable. Proton is a stable particle in standard model. Also, 1.67×10^32 is not the estimated life-time for these theories. This is the lower limit constraint from the experimental search for this hypothetical proton decay. I can't say this is encouraging result.