A viral Washington Post article from last year determined that the country is only four presidents’ lifetimes old. Starting from the current president, when Barack Obama was born on August 4, 1961, former President Herbert Hoover was still alive. When Hoover was born on August 10, 1874, former President Andrew Johnson was still alive. When Andrew Johnson was born on December 29, 1808, former President John Adams was still alive.

Or if starting from the oldest currently-living president — George H.W. Bush who was born on June 12, 1924 — when Bush was born, former President William Howard Taft was still alive. When Taft was born on September 15, 1857, former President Martin Van Buren was still alive. When Van Buren was born on December 5, 1782, most of the Founding Fathers were still alive, including George Washington, John Adams, and Thomas Jefferson.

How many lifetimes for the longest-living members Congress?

So how many lifetimes for the longest-living members Congress do you have to go back to reach the founding of the country? According to a GovTrack Insider analysis, it’s even less than for the presidents. The presidents took four lifetimes. Congress takes only three.

The oldest current member of Congress is Rep. John Conyers, Jr. (D-MI13), who was born May 16, 1929. When Conyers was born, former Rep. J. Warren Keifer was still alive, an Ohio Republican who served from 1877–85 and again from 1905–11. When Keifer was born on January 30, 1836, former Rep. Paine Wingate was still alive, a New Hampshire representative who was alive at the Founding and served a single term from 1793–95. (The first Congress convened four years earlier in 1789.)

Or we could start from the oldest currently-surviving member of Congress: 101-year-old Ken Hechler, a West Virginia Democrat who served from 1959 to 1977. (He also ran an unsuccessful bid for the U.S. Senate in 2010 at age 95.) When Hechler was born on September 20, 1914, George William Palmer was still alive, a New York Republican congressman who served from 1857–61. When Palmer was born on January 13, 1818, George Leonard was still alive, a Massachusetts Federalist who served two stints from 1789–93 and 1795–97.

A next President?

Given ever-increasing lifespans, if Obama lives long enough, a future president potentially more than a century from now could have been alive when Obama was.

And considering that many current members of Congress are younger than the president — the youngest, Rep. Elise Stefanik (R-NY), is only 31 years old — the country may remain only three or four members of Congress’ lifetimes old for a very long time to come.

This article was written by GovTrack Insider staff writer Jesse Rifkin.