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Primes
medium
0:00.0
If
p
p
p
is a prime number, what is the value of
ϕ
(
p
)
\phi(p)
ϕ
(
p
)
?
A
p
p
p
B
p
+
1
p+1
p
+
1
C
p
−
1
p-1
p
−
1
D
1
1
1
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