What is the longest golf putt on record?

Longest putt - 140' 2 3/4 inches.

Bob Cook holds the record for the longest recorded putt in tournament golf. During the 1976 International Fourball Pro Am Tournament, he holed a 140-foot-and-2 3/4-inch-long putt at St. Andrews’ 18th hole.

https://blog.golfnow.com/did-you-know-25-golf-fun-facts

In 1989, Nick Faldo sinks a 100-foot birdie putt on the second hole at Augusta National in the Masters, the longest putt holed to date in a major tournament. Faldo goes on to win the Masters.
http://hypertextbook.com/facts/2007/MelissaTam.shtml

For a twist: On the eve of the Ryder Cup in 1999, Spain’s Jose Maria Olazabal putts a ball a record 9.2 miles during a Concorde flight to the United States. His putt broke American Brad Faxon’s 1997 world record of 8.5 miles (13.68 kilometres) and travelled the length of the supersonic airliner’s 150 foot cabin in 26.17 seconds to land in the cup at the first attempt. With Concorde travelling at 1,270 mph, the ball was actually in motion for 9.232 miles, a spokeswoman for British Airways said. The flight time of three hours six minutes was also a record for the London Boston route.

http://puttingzone.com/clock.html