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Old 2021-05-20, 00:21   #7
slandrum
 
Jan 2021
California

2·191 Posts
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Quote:
Originally Posted by kriesel View Post
So for twins, both of which are exponents of Mersenne primes, we have
3 5; 5 7; 17 19. I'm guessing we'll find no more such cases.
There may be an infinite number of them, but my guess no-one's going to find one for a very long time if there are.
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