1, 4, 16, and 64 is a pattern. It multiplies by 4 each time. The next number would be 256.
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1, 2, 4, 8, 16, 32 1, 2, 4, 8, 16, 32, 64
44
1, 2, 4, 8, 16, 32, 64 All but 1 and 2 are composite.
1, 2, 4, 8, 16, 32, 64 -1, -2, -4, -8, -16, -32, -64
Common factors of 64 and 16 are: 1, 2, 4, 8, and 16.