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Divisibility
hard
0:00.0
Which of the following primes
p
p
p
satisfy
p
∣
2
p
−
1
p | 2^p - 1
p
∣
2
p
−
1
?
A
2
2
2
B
3
3
3
C
5
5
5
D
7
7
7
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