Quote:
Originally Posted by sweety439
Well, primo cannot handle numbers > 2^65536, or the repunit R49081 (=(10^49081-1)/9) will be already proven to be prime.
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https://primes.utm.edu/top20/page.php?id=27 suggests you're mistaken about the size of numbers Primo can handle.
Maybe you should run that Primo proof yourself- it's just 25% or so more digits than the current record holder. Shouldn't take you long, right?