My own score used to vary widely when I did 'proper' IQ tests (i.e. ones set by university psychologists) many years ago. (I've not done one for a very long time, as I'd rather not know how much my brain cells have degraded!).
The lowest I can remember scoring was 138, with most of my results in the 140s but a few over 160 or simply given as 'outside the limits of the test'.
However the figures are largely meaningless anyway. There are people on this website whom I regard as exceptionally intelligent but who might not necessarily score particularly well on an IQ test, simply because such tests only measure one sort of intelligence.