How many Jews died because of the Holocaust during World War II?

Explanation

It is difficult to come to a precise figure as to how many Jews lost their lives during Holocaust. Whilst the Nazis kept precise protocols, not everything was registered anyway - especially not in the last days of war. On top of this, the SS-Einsatztruppe made a number of arbitrary killings on the Eastern front. All in all, some 6 million Jews are thought to have been victims. If other persecuted groups are counted too, then an estimated 11 million people fell victim to the Nazis.