In Big Sky Bonus under the 4/28 · Apr 2016 – Nov 2016 rules — 227 draws, 4 from 1–28 (an earlier era).
31times drawn · chance expected 32 −0.27σ
15draws waiting · a wait this long: 12% for any number
6.9average wait between appearances · chance says 7.0
27longest completed wait · 42% chance of one at least that long
13 is drawn as often as chance explains
Drawn 31 times in 227 draws against 32.4 expected, −0.27σ. Each draw is independent: after 15 draws away it is exactly as likely tonight as a number drawn yesterday.
13
Number 13, draw by draw
Drawn 31 times in 227 draws · average wait 6.9 draws · longest completed wait 27 · waiting 15 draws now
a completed wait — darker is longer the wait still running — a lower bound, not a finished gap
Where it lands in a sorted draw
Sort a draw and 13 has a favourite seat — chance gives a small number the low positions more often. That is the shape of sorting, not of the machine.
It has shared a draw with every one of the other 27 numbers; chance expected about 0.9 still unmet by now. Every pair →
How many people play it
Under the crowd model, 13 is picked about 0.92× as often as an indifferent choice — 28th most popular of 28. That changes nothing about whether it comes up, and everything about how many ways a jackpot on it would be shared.
Nothing here predicts the next draw. A number’s history is a record of a fair machine’s past, and the machine keeps none of it: 13 is drawn with probability 4/28 tonight whatever it did last week.