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Give a boffin a Xeon and a big GPU, get a new big prime number

JetSetJim Silver badge

Well, you can make massive jumps quite easily, but slowly incrementing is possibly harder, particularly as this seems to be looking for Generalised Fermat primes, rather than just a regular prime.

I'd have thought it would be relatively easy to beat this number as the "largest prime" given a sufficiently large and complete set of primes. If the current largest prime has 22+ billion digits to it, then you just collect a sufficiently large set of primes, multiply them all together and subtract 1 - bingo.

I suspect it may be more complicated than this, though... :(

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