Nick W wrote: > IMO they should start now and think 128 bit. That should last like a > trillion years... A bit longer than that. Back of an envelope says a 64-bit extension of the current 32-bit value will last about 250 billion years, so extending to 128 would last... erm... ~5,000,000,000,000,000,000,000,000,000,000 years. Chris.