Number 21

In SuperEnalotto under the 6/90 + 1/90 · Dec 1997 – Jul 2009 rules — 1,425 draws, 6 from 1–90 (an earlier era).

87times drawn · chance expected 95 −0.85σ

41draws waiting · a wait this long: 6% for any number

15.7average wait between appearances · chance says 15.0

104longest completed wait · 7% chance of one at least that long

21 is drawn as often as chance explains

Drawn 87 times in 1,425 draws against 95.0 expected, −0.85σ. Each draw is independent: after 41 draws away it is exactly as likely tonight as a number drawn yesterday. It has also come out as the bonus ball 11 times, counted separately.

Number 21, draw by draw

Drawn 87 times in 1,425 draws · average wait 15.7 draws · longest completed wait 104 · 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 small number the low positions more often. That is the shape of sorting, not of the machine.

1st smallest20 · chance 23.6
2nd smallest37 · chance 36.2
3rd smallest20 · chance 20.9
4th smallest8 · chance 5.6
5th smallest2 · chance 0.7
6th smallest0 · chance 0.0

Every position’s lane →

The company it keeps

Seen most often with these — chance gives every partner about 4.9 shared draws, and the leaders are simply the ones that came out ahead this time.

16 55 3 11 28 59

Never drawn alongside 1 of the other 89 numbers; chance expects about 0.7 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.

Numbers 1–31 — the birthday zone ×1.22

The model and its sources → · What people believe about 21 →

Every draw it appeared in

Date	Wait	Position	The draw
2009-03-26	1	2nd	13 21 70 71 72 85
2009-03-24	30	4th	1 9 11 21 36 47
2009-01-13	31	3rd	9 14 21 55 66 90

What this cannot tell you

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.

2007-03-06	12	3rd	1 8 21 30 81 86
2007-02-06	2	1st	21 35 39 54 62 85
2007-02-01	12	3rd	1 20 21 27 44 75
2007-01-04	11	1st	21 40 76 77 83 84
2006-12-09	21	1st	21 23 28 48 49 54
2006-10-21	14	3rd	4 5 21 26 42 79
2006-09-19	6	5th	4 6 8 14 21 28
2006-09-05	13	2nd	16 21 51 64 65 89
2006-08-05	1	3rd	5 11 21 49 54 84
2006-08-03	8	1st	21 22 25 53 76 85
2006-07-15	4	2nd	16 21 27 43 56 64
2006-07-06	10	1st	21 22 34 55 56 74
2006-06-13	22	3rd	10 13 21 31 48 72
2006-04-22	23	2nd	16 21 59 70 71 83
2006-02-28	39	2nd	3 21 63 81 87 89
2005-11-29	13	3rd	1 12 21 36 40 84
2005-10-29	20	3rd	3 6 21 24 37 48
2005-09-13	29	2nd	18 21 24 28 74 77
2005-07-07	20	2nd	17 21 40 55 64 79
2005-05-07	3	3rd	6 11 21 30 58 63
2005-04-27	15	4th	13 15 19 21 82 86
2005-03-05	18	2nd	19 21 36 55 77 87
2005-01-03	5	2nd	10 21 22 43 61 66
2004-12-15	8	4th	3 4 15 21 61 67
2004-11-17	1	2nd	19 21 27 47 59 88
2004-11-13	2	2nd	2 21 33 38 45 46
2004-11-06	14	3rd	13 18 21 31 41 56
2004-09-18	52	2nd	2 21 24 27 42 68
2004-03-20	65	1st	21 41 60 69 71 83
2003-08-06	24	2nd	8 21 24 42 72 73
2003-05-14	6	2nd	16 21 38 44 67 87
2003-04-23	41	2nd	11 21 40 66 68 83
2002-12-12	3	3rd	3 8 21 33 46 86
2002-12-05	14	3rd	14 17 21 31 33 69
2002-10-19	3	2nd	10 21 23 35 55 89
2002-10-09	11	1st	21 22 52 59 65 76
2002-08-31	14	1st	21 28 29 36 45 54
2002-07-13	3	1st	21 38 63 70 71 83
2002-07-03	10	2nd	14 21 34 37 66 73
2002-05-29	9	1st	21 36 38 72 79 82
2002-04-27	4	1st	21 37 41 45 60 71
2002-04-13	20	2nd	18 21 76 79 80 84
2002-02-02	12	1st	21 28 60 68 71 88
2001-12-27	1	2nd	20 21 26 53 80 90
2001-12-22	7	2nd	3 21 32 48 59 68
2001-11-28	8	1st	21 32 35 40 66 83
2001-10-31	12	4th	5 11 17 21 28 63
2001-09-19	11	2nd	10 21 30 45 55 57
2001-08-11	16	1st	21 25 31 44 49 52
2001-06-16	60	4th	7 12 19 21 60 81
2000-11-18	4	2nd	3 21 42 49 64 85
2000-11-04	2	2nd	19 21 28 50 53 62
2000-10-28	6	2nd	6 21 29 43 80 89
2000-10-07	15	4th	8 10 16 21 39 65
2000-08-16	59	2nd	14 21 27 49 82 83
2000-01-22	2	2nd	15 21 55 60 70 90
2000-01-15	6	2nd	11 21 22 50 59 63
1999-12-27	3	2nd	20 21 63 71 75 79
1999-12-15	10	2nd	18 21 28 35 41 85
1999-11-10	3	1st	21 45 55 61 73 80
1999-10-30	104	2nd	16 21 29 39 70 90
1998-10-31	60	2nd	1 21 30 61 73 84
1998-04-04	—	3rd	1 7 21 49 84 87