All known algorithms for getting an answer take lots of computing power, and even relatively small versions might be out of reach of any classical computer. (science.sciencemag.org)
Since digital currency miners need lots of computing power to solve mining puzzles, they need to run as many graphics cards in their computers as possible. (dailybitcoinnews.com)
In order to get bitcoins, miners must solve complex mathematical problems that require lots of computing power and time to solve. (uphold.com)