Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Primes and Tetration link - Bertrand's postulate
#1
Just stumbled with this:

"Bertrand's postulate implies that there are infinitely many numbers a for which floor(2^a), floor(2^2^a), floor(2^2^2^a), ... are all prime. The smallest of these is a = 1.25164 75977 90463 01759 44320 53623... and generates the Bertrand primes: 2, 5, 37, 137438953481, .... The next Bertrand prime has 41,373,247,571 digits. [Caldwell]"

Source: http://primes.utm.edu/curios/page.php/137438953481.html

deep links around?
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  [NT] primes in [1,p(p+1)] fact tommy1729 0 1,229 03/28/2016, 09:34 PM
Last Post: tommy1729
  The sine sieve for primes ? tommy1729 1 1,662 05/10/2015, 08:06 AM
Last Post: tommy1729



Users browsing this thread: 1 Guest(s)