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prime number

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Primes without 7s

James Maynard, one of the prize winners at the European Congress of Mathematics 2016, is counting primes that don't have 7s in them. But why?
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Find the gap

There's been progress on one of the biggest open problems in maths: the twin prime conjecture.
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From 70 million to just 600...

This year has seen a flurry of results as mathematicians hunt down the elusive proof of the twin prime conjecture. Will they get their wish for Christmas this year?