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2 is the only multiple of 2 in prime numbers.

2 x 2 = 4

2 x 2 x 2 = 8

2 x 2 x 2 x 2 = 16

2 x 2 x 2 x 2 x 2 = 32

2 x 2 x 2 x 2 x 2 x 2 = 64

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