Find all powers of 4 in range 4 through 1,000

They are 4, 16, 64 and 256. The next one is just out of range, it is 4^5=1024

Explanation:

4 raised to power 1 = 4¹ = 4

4 raised to power 2 = 4² = 16

4 raised to power 3 = 4³ = 64

4 raised to power 4 = 4⁴ = 256

4 raised to power 2 = 4⁵ = 1024.  

All the powers are 4, 16, 64 and 256.

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