8^n+47 is prime
Source: 2021 Greek Junior MO p3 (served as Greek JBMO TST p3 since the latter didn't take place)
July 3, 2021
number theoryprime
Problem Statement
Determine whether exists positive integer such that the number is prime.
Source: 2021 Greek Junior MO p3 (served as Greek JBMO TST p3 since the latter didn't take place)