What is the hottest thing man made?

Answer 1

The hottest temperature man has ever made as of today was measured in a whopping 4 trillion degrees Celsius, 250,000 times hotter than the sun. This was generated with the use of Relativistic Heavy Ion Collider (RHIC), which is one of the two existing heavy-ion collider and the only spin-polarized proton collider in the world.

Answer 2

an astonishing 3.6 billion degrees Fahrenheit (2 billion degrees celsius), which is hotter than the center of the sun (28,080,000 Fahrenheit). This was achieved by the Z-machine at Albuerque, New Mexico.