No, the radioactive decay will follow a (nearly) continuous exponential curve. Half-life is just an arbitrarily chosen point on that curve: the point at which half of the atoms have decayed. With carbon dating you are basically solving this equation: percent of carbon 14 left = 0.5 ^ (years since death/5,730). If it has been 500 years since death, you would expect 94% of the original carbon 14 to remain.

That said, you generally have error boundaries spanning multiple decades and it measures since time of death (when new carbon stops being integrated into the body) not time of birth, so it would not be useful for this.