Population growth for a human colony?

Question

How long would it take a group of humans, three male two female, to create a population of 1.5 million with a final population growth of only 357 births per 356 deaths?

Answer 1

1 million years?

Answer 2

It looks that there is one birth more than the death rate, so approximately 1.5 million years.

Answer 3

If a population got that low, you're looking at extinction. The number of females is just too low. Humans carry too many genetic defects, and breed too slowly to compensate for a high rate of inbreeding defects.