Mathematician makes breakthrough on 100-year-old problem about knots
5 February 2021
Some tangles that look like knots are actually “the unknot”, which can be untangled into a simple loop, and a new algorithm has sped up the process of finding them
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Premium
Inside the race to find the first billion-digit prime number
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Discovering giant prime numbers involves laborious trial and error, and they are of little use when they are found. For certain devotees, that's beside the point
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Quantum computers will smash our best encryption. To make everything from online chats to government intelligence safe, we need maths no machine could solve
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