When I finished my first century, I didn't care about the time. I was just happy to have done it. But, doing a century at my age (57) is like climbing Mt. Fuji. If you do it once, you are an idiot. If you do it twice, you're a bigger idiot.
I must be a bigger idiot because I am going to do it again, and try it to get down near about 6 hrs, 30 minutes. My chances of getting it down to 5 hours are pretty slim, but not impossible. I will just have to sustain idiocy longer.