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1986 Bulgaria National Olympiad
Problem 1
n^2-n+11 has four prime factors
n^2-n+11 has four prime factors
Source: Bulgaria 1986 P1
June 15, 2021
number theory
Problem Statement
Find the smallest natural number
n
n
n
for which the number
n
2
ā
n
+
11
n^2-n+11
n
2
ā
n
+
11
has exactly four prime factors (not necessarily distinct).
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