https://en.wikipedia.org/wiki/Ineos_1:59_Challenge

The Ineos 1:59 Challenge, held on 12 October 2019, was an attempt by Kenyan athlete Eliud Kipchoge to break the two-hour mark for running the marathon distance, which he achieved in a time of 1:59:40.2. The event was specifically created for Kipchoge and held in Vienna, Austria... 41 pacemakers, rotating in and out in groups of 7, assisted Kipchoge throughout the attempt. Due to the presence of the pacemakers, delivery of hydration by bicycle, and the lack of open competition, the achievement was not eligible to be ratified as a marathon world record, and is not recognized as such by World Athletics. 