Your results will be biased. It is tiny with small values of N, and absent when N is a power of two, but the skew becomes more obvious when your N is 2^31 + 2^3

Your results will be biased. It is tiny with small values of N, and absent when N is a power of two, but the skew becomes more obvious when your N is 2^31 + 2^30 + 1, for example.