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Poland Contests
Poland - Second Round
1994 Poland - Second Round
6
6
Part of
1994 Poland - Second Round
Problems
(1)
p | n^2 -n+3 iff p | m^2 -m+25
Source: Polish second round 1994 p6
1/19/2020
Let
p
p
p
be a prime number. Prove that there exists
n
∈
Z
n \in Z
n
∈
Z
such that
p
∣
n
2
−
n
+
3
p | n^2 -n+3
p
∣
n
2
−
n
+
3
if and only if there exists
m
∈
Z
m \in Z
m
∈
Z
such that
p
∣
m
2
−
m
+
25
p | m^2 -m+25
p
∣
m
2
−
m
+
25
.
number theory
divides
prime