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However, regarding Nigma, it's worth mentioning that such a search engine exists – I tried using it once. It works by searching through the caches of popular search engines – Google, Yandex, Rambler, etc. It doesn't stand out in any particular way, except for the fact that it has a network marketing system attached to it. But it's worth checking out the search engine for fun.
I prefer Google, but Nigma is also quite an interesting tool, especially because of its filters. I sometimes use it when I need to find something related to mathematics, as Google immediately provides some nonsense, primarily Wikipedia.