There's something else remarkable about what the Soviets and Russians accomplished
They did a lot of their best work without the benefit of tools like supercomputers. Instead of using brute force computational methods, they did it with finesse. When the Soviet Union collapsed and many of the technology trade restrictions were eased, several top American high tech companies set up offices to hire top Russian talent to leverage their skills in areas like multprocessing. We learned a lot from them. The Russians have a long and proud history of mathematical and scientific accomplishment.