> 10^36 yr lifetime [1] which is within experimental reach. For this might want to assume that for each proton its lifetime is a random variable that obeys a P

> 10^36 yr lifetime [1] which is within experimental reach. For this might want to assume that for each proton its lifetime is a random variable that obeys a Poisson process. That's asking a LOT, might be seen as putting some severe constraints on what is going on with a proton and its internals.