Setting a goal of riding weekly centuries is not a trivial endeavor. Aside from the accumulated stress on the body from doing such long rides, you may be setting yourself up for failure. Are you mentally prepared to ride all day in the rain? Or high winds? Assuming you work for a living and are basically limited to riding on weekends, you will have to deal with whatever weather Mother Nature throws your way.
Don't try to make up for lost time all at once. Better to work up to long riding slowly. You'll have less risk of injury and a better chance of success.