IMO Shortlist 2000 problem N3
Dodao/la:
arhiva2. travnja 2012. Does there exist a positive integer
such that
has exactly 2000 prime divisors and
divides
?
%V0
Does there exist a positive integer $n$ such that $n$ has exactly 2000 prime divisors and $n$ divides $2^n + 1$?
Izvor: Međunarodna matematička olimpijada, shortlist 2000