I think it depends on what you mean by “last,” a star might “last” even longer than 5×10^12 years before the last component nucleons of its remnant evaporate. I

I think it depends on what you mean by “last,” a star might “last” even longer than 5×10^12 years before the last component nucleons of its remnant evaporate. If you consider how long a star lasts to be how long it emits around the same amount of energy until becoming another class of object the time will be shorter. Sol will grow large and red in another 4×10^9 years or so, then after that phase it’ll leave a stellar remnant like a brown dwarf or neutron star, which will last another period of time. How long did Sol last?