The world’s first nuclear explosion was an implosion device that used plutonium for fissile material. The Manhattan Project scientists who designed the device dubbed it the gadget. It was detonated successfully on 16 July 1945 near Alamagordo, New Mexico, in what was called the Trinity test.
https://www.ctbto.org/nuclear-testing/types-of-nuclear-weapons/
Tsar Bomba. Tsar Bomba (Russian: царь-бомба; Tsar-bomb) was the Western nickname for the Soviet RDS-220 hydrogen bomb (code name Ivan or Vanya), the most powerful nuclear weapon ever detonated. Its test on 30 October 1961 remains the most powerful man-made explosion in history.
https://en.wikipedia.org/wiki/Tsar_Bomba
Coordinates: 73°48′26″N 54°58′54″E / 73.80722°N 54.98167°E / 73.80722; 54.98167. Tsar Bomba (Russian: царь-бомба; Tsar-bomb) was the Western nickname for the Soviet RDS-220 hydrogen bomb (code name Ivan or Vanya), the most powerful nuclear weapon ever detonated. Its test on 30 October 1961 remains the most powerful man-made explosion in history.
https://en.wikipedia.org/wiki/Tsar_Bomba
Tsar Bomba (RDS-220 hydrogen bomb) - 50Mt. The RDS-220 hydrogen bomb, also known as the Tsar Bomba, is the biggest and most powerful thermo nuclear bomb ever made. It was exploded by the Soviet Union on 30 October 1961 over Novaya Zemlya Island in the Russian Arctic Sea. The hydrogen bomb was air dropped by a Tu-95 bomber using huge fall-retardation parachute.
http://www.army-technology.com/features/featurethe-biggest-and-most-powerful-nuclear-weapons-ever-built-4206787/
These are the 12 largest nuclear detonations in history. In a surprise announcement, North Korea has claimed that it successfully tested a hydrogen bomb. Since the first nuclear test on July 15, 1945, there have been over 2,051 other nuclear weapons tests around the world.
http://www.businessinsider.com/largest-nuclear-detonations-in-history-2015-3
To put the size of history's largest nuclear blasts to scale, we have used Alex Wellerstein's Nukemap, a tool for visualizing the terrifying real-world impact of a nuclear explosion. In the following maps, the first ring of the blast is the fireball, followed by the radiation radius.
http://www.businessinsider.com/largest-nuclear-detonations-in-history-2015-3
The largest nuclear explosion in history was the 1961 Soviet “Tsar Bomba” test, which measured more than 50 megatons (3,800 times more powerful than the Hiroshima bomb).
https://www.ctbto.org/nuclear-testing/types-of-nuclear-weapons/
In terms of testing, no nuclear components need to be verified with the gun-type design; only the conventional components must be tested. Although the United States was able to prove that the chain reaction would work, it did not conduct an actual nuclear test of this design before it was used to bomb Hiroshima.
https://www.ctbto.org/nuclear-testing/types-of-nuclear-weapons/
Timeline on North Korea’s Nuclear Program. The country’s nuclear weapons program and its development of long-range rocket systems have angered many in the West, including in the United States, where the last several presidents have struggled to try to force the North to end its push for nuclear arms. UPDATED November 20, 2014.
https://www.nytimes.com/interactive/2014/11/20/world/asia/northkorea-timeline.html
Pyongyang, which has a history of exaggerating its successes, claims that the test was a perfect success.. North Korea also believes that its successful miniaturization of a hydrogen bomb elevates the country's nuclear might to the next level..
http://www.businessinsider.com/largest-nuclear-detonations-in-history-2015-3
largest nuclear test in history
The largest nuclear test in history is a North Korea has claimed that it successfully tested a hydrogen bomb.