In SiVinceTutto under the 6/90 · since Sep 2024 rules — 106 draws, 6 from 1–90.
7times drawn · chance expected 7 −0.03σ
9draws waiting · a wait this long: 58% for any number
14.0average wait between appearances · chance says 15.0
61longest completed wait · 9% chance of one at least that long
21 is drawn as often as chance explains
Drawn 7 times in 106 draws against 7.1 expected, −0.03σ. Each draw is independent: after 9 draws away it is exactly as likely tonight as a number drawn yesterday.
21
Number 21, draw by draw
Drawn 7 times in 106 draws · average wait 14.0 draws · longest completed wait 61 · waiting 9 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 21 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 62 of the other 89 numbers; chance expects about 60 such strangers by now. Every pair →
How many people play it
Under the crowd model, 21 is picked about 1.22× as often as an indifferent choice — 15th most popular of 90. 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: 21 is drawn with probability 6/90 tonight whatever it did last week.