In Powerball under the 5/59 + 1/35 · Jan 2012 – Oct 2015 rules — 388 draws, 5 from 1–59 (an earlier era).
29times drawn · chance expected 33 −0.71σ
25draws waiting · a wait this long: 12% for any number
12.8average wait between appearances · chance says 11.8
75longest completed wait · 4% chance of one at least that long
15 is drawn as often as chance explains
Drawn 29 times in 388 draws against 32.9 expected, −0.71σ. Each draw is independent: after 25 draws away it is exactly as likely tonight as a number drawn yesterday.
15
Number 15, draw by draw
Drawn 29 times in 388 draws · average wait 12.8 draws · longest completed wait 75 · waiting 25 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 15 has a favourite seat — chance gives a small number the low positions more often. That is the shape of sorting, not of the machine.
Never drawn alongside 8 of the other 58 numbers; chance expects about 8 such strangers by now. Every pair →
How many people play it
Under the crowd model, 15 is picked about 1.04× as often as an indifferent choice — 14th most popular of 59. 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: 15 is drawn with probability 5/59 tonight whatever it did last week.