The breakthrough, described in the journal Science, is based on 150 genetic "signposts" found in exceptionally long-lived people. The researchers created a mathematical model which takes information from these signposts to work out a person's chance of reaching 100. It is based on the largest worldwide study of centenarians ever undertaken.
Some of the research team members are now building a web site that can help predict your life expectancy, based on the factors uncovered in the study. Once these factors are identified, you can presumably modify your lifestyle to add years to your life. It will include both genetic and non-genetic factors that affect life expectancy. The site is expected to be online within a few weeks.