Comb sort average complexity

Question

The wikipedia page about comb sort claims that the average complexity of comb sort is Omega(n^2/2^p) where p is the number of increments. Take as example an uniform distributed array of 1000 elements, using the standard shrink factor of 1.3 the length of the gaps list is 23. Is this the p mentioned in the wikipedia article? If it is the complexity is omega of 1000^2 / 2^23 ~ 0.120 Someone could please explain what I don't understand? Thank in advance