have detected discrepancies in that list; one device was abandoned in its cove in a tunnel in Semipalatinsk when the Soviets abandoned Kazakhstan, and one list lists 13 other tests which apparently failed to provide any yield. The source for that was the well respected Russian Strategic Nuclear Forces which confirms 11 of the 13; those 11 are in the Wikipedia lists.

The Soviet Union conducted 715 nuclear tests (by the official count)