In Lotto under the 6/50 + 1/25 · since Apr 2025 rules — 230 draws, 1 from 1–25.
10times drawn · chance expected 9 +0.27σ
41draws waiting · a wait this long: 20% for any number
20.9average wait between appearances · chance says 25.0
67longest completed wait · 47% chance of one at least that long
21 is drawn as often as chance explains
Drawn 10 times in 230 draws against 9.2 expected, +0.27σ. Each draw is independent: after 41 draws away it is exactly as likely tonight as a number drawn yesterday.
21
Number 21, draw by draw
Drawn 10 times in 230 draws · average wait 20.9 draws · longest completed wait 67 · waiting 41 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 large number the high positions more often. That is the shape of sorting, not of the machine.
Never drawn alongside 24 of the other 24 numbers; chance expects about 24 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 — 14th most popular of 25. 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 1/25 tonight whatever it did last week.
Lotto number 21 (star deck) — how often, how long a wait, and with whom — LotteryOracle