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2013 India Regional Mathematical Olympiad
3
Almost a Classic Divisibility Problem
Almost a Classic Divisibility Problem
Source: Indian RMO 2013 Paper 1 Problem 3
February 1, 2014
number theory
easy
nice
Problem Statement
Find all primes
p
p
p
and
q
q
q
such that
p
p
p
divides
q
2
−
4
q^2-4
q
2
−
4
and
q
q
q
divides
p
2
−
1
p^2-1
p
2
−
1
.
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