Software engineer Ken Shirriff has tested the Apollo Guidance Computer on the Bitcoin network. The computer which helped astronauts navigate to the moon was found to mine one hash every 10.3 seconds. Shirriff noted that at current hash rate levels, it would take a “billion times the age of the universe to mine a block”. Shirriff previously experimented with how long it would take to mine bitcoin by hand. Unsurprisingly, mining by hand is noncompetitive resulting in 0.67 hashes per day.
Source: Ken Shirriff’s Blog