Believe it or not, the first cell that became you was created a few months before your mother was born. Since Benjamin Franklin's mother was born on August 15, 1667. It is a scientific fact that the egg that Mr. Franklin 'hatched' out of formed upon this earth sometime in the Late Winter/Early Spring of 1667. What this means is that Benjamin Franklin's first cell was created under the Year of the Sheep/Goat.
Interesting side note is that Charles the II was the reigning King of the American Colonies. And Mr. Franklin's adopted colony of Pennsylvania was yet to be created, as this area was a still part of the Dutch Empire in 1667.
Given this perspective, Benjamin Franklin lived for 123 years.