Depends on the unit and how you interpret the bits. Nanoseconds as a signed integer "only" make it about 300 years while seconds as a 64 bit IEEE float enjoy integral precision somewhere out past 250 million years (but if you need microsecond precision then it's the same number but as years instead of mega years).
alt Hacker News
Depends on the unit and how you interpret the bits. Nanoseconds as a signed integer "only" make it about 300 years while seconds as a 64 bit IEEE float enjoy integral precision somewhere out past 250 million years (but if you need microsecond precision then it's the same number but as years instead of mega years).