The AN602 nuclear bomb, codenamed Tsar Bomba, went down in history as the most powerful bomb, having a blast yield of 50 megatons of TNT.
It was tested over the Sukhoy Nos cape on Novaya Zemlya's Severny Island in Russia's north at an altitude of 4,000 metres.
Rosatom, Russia's state nuclear energy corporation, has unveiled previously classified photos of the test, which Sputnik welcomes you to have a look at in our photo gallery.