The book is now available! 3449
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 
Participate:
+ 2^^n-5 = 2^(2^(2^...(2^2)..))-5 is divisible by 3449 for all sufficiently large n. 3449 is the only prime less than a million for which this is true. [Hartley]

  To link to this page use http://primes.utm.edu/curios/page.php?number_id=2906



Prime Curios! © 1999-2009 (all rights reserved)