Number 81

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

116times drawn · chance expected 95 +2.23σ

18draws waiting · a wait this long: 31% for any number

12.2average wait between appearances · chance says 15.0

48longest completed wait · 99% chance of one at least that long

81 is drawn as often as chance explains

Drawn 116 times in 1,425 draws against 95.0 expected, +2.23σ. Each draw is independent: after 18 draws away it is exactly as likely tonight as a number drawn yesterday. It has also come out as the bonus ball 16 times, counted separately.

Number 81, draw by draw

Drawn 116 times in 1,425 draws · average wait 12.2 draws · longest completed wait 48 · waiting 18 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 81 has a favourite seat — chance gives a large number the high positions more often. That is the shape of sorting, not of the machine.

1st smallest0 · chance 0.0
2nd smallest0 · chance 0.0
3rd smallest0 · chance 0.7
4th smallest18 · chance 8.3
5th smallest45 · chance 39.8
6th smallest53 · chance 67.2

Every position’s lane →

The company it keeps

Seen most often with these — chance gives every partner about 6.5 shared draws, and the leaders are simply the ones that came out ahead this time.

80 24 37 55 66 83

It has shared a draw with every one of the other 89 numbers; chance expected about 0.1 still unmet by now. Every pair →

How many people play it

Under the crowd model, 81 is picked about 0.86× as often as an indifferent choice — 38th 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 above 31 ×0.86

The model and its sources → · What people believe about 81 →

Every draw it appeared in

Date	Wait	Position	The draw
2009-05-19	36	5th	36 55 62 66 81 85
2009-02-24	35	6th	33 38 47 67 68 81
2008-12-04	4	6th	17 44 49 60 66 81

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: 81 is drawn with probability 6/90 tonight whatever it did last week.

2007-04-21	6	5th	11 19 43 75 81 87
2007-04-07	9	6th	1 29 37 67 74 81
2007-03-17	2	5th	10 43 55 56 81 87
2007-03-13	3	5th	13 46 48 76 81 83
2007-03-06	5	5th	1 8 21 30 81 86
2007-02-22	3	5th	28 44 51 72 81 90
2007-02-15	27	6th	11 22 35 65 78 81
2006-12-14	11	6th	1 31 48 75 78 81
2006-11-18	14	4th	36 55 59 81 82 89
2006-10-17	10	6th	4 18 24 49 66 81
2006-09-23	6	6th	8 23 39 52 75 81
2006-09-09	9	5th	7 10 24 31 81 84
2006-08-19	4	4th	6 59 77 81 82 88
2006-08-10	29	5th	6 9 42 48 81 87
2006-06-03	21	6th	20 68 70 71 72 81
2006-04-15	20	5th	10 11 13 37 81 84
2006-02-28	17	4th	3 21 63 81 87 89
2006-01-19	5	6th	25 55 60 69 77 81
2006-01-07	2	4th	43 45 80 81 83 86
2006-01-03	26	6th	13 14 22 24 46 81
2005-11-03	1	6th	9 13 17 47 63 81
2005-11-02	26	5th	5 31 57 66 81 85
2005-09-01	12	6th	9 12 20 55 69 81
2005-08-04	5	4th	24 37 64 81 84 90
2005-07-23	29	4th	41 48 66 81 86 87
2005-04-30	2	6th	16 31 53 63 70 81
2005-04-23	4	5th	1 32 37 68 81 88
2005-04-09	46	6th	29 30 61 65 73 81
2004-10-30	32	6th	4 13 19 30 53 81
2004-07-10	11	6th	13 30 47 66 74 81
2004-06-03	2	6th	13 16 42 61 63 81
2004-05-26	26	5th	26 65 73 76 81 90
2004-02-25	2	5th	66 72 76 77 81 85
2004-02-18	1	5th	12 20 55 79 81 82
2004-02-14	6	4th	17 35 41 81 82 86
2004-01-24	15	5th	22 27 48 52 81 83
2003-12-03	3	6th	7 20 29 55 71 81
2003-11-22	2	5th	3 27 54 65 81 83
2003-11-15	4	4th	35 54 78 81 86 88
2003-11-03	9	6th	9 25 37 73 80 81
2003-10-01	6	4th	17 55 66 81 86 89
2003-09-10	1	6th	39 50 51 64 72 81
2003-09-06	44	6th	16 17 49 50 74 81
2003-04-05	2	6th	12 18 47 63 75 81
2003-03-29	10	5th	1 31 54 80 81 85
2003-02-22	6	4th	17 41 45 81 82 88
2003-02-01	10	5th	14 24 40 56 81 90
2002-12-31	3	6th	24 31 37 45 71 81
2002-12-24	2	5th	1 3 6 42 81 83
2002-12-19	29	5th	18 27 49 59 81 88
2002-09-18	14	5th	11 18 55 77 81 85
2002-07-31	10	6th	8 12 36 62 68 81
2002-06-26	24	5th	9 11 17 38 81 88
2002-04-03	12	6th	15 37 40 47 64 81
2002-02-20	19	6th	1 61 66 70 78 81
2001-12-19	48	5th	19 25 49 53 81 84
2001-07-04	5	6th	13 29 40 61 73 81
2001-06-16	8	6th	7 12 19 21 60 81
2001-05-19	11	6th	6 36 52 68 80 81
2001-04-11	6	5th	11 41 52 71 81 89
2001-03-21	19	6th	39 43 56 61 65 81
2001-01-13	14	4th	44 50 57 81 83 90
2000-11-25	7	6th	3 14 49 52 65 81
2000-11-02	5	5th	2 55 76 78 81 85
2000-10-14	24	5th	24 35 37 63 81 85
2000-07-22	36	6th	10 13 42 54 66 81
2000-03-18	8	4th	8 58 76 81 85 87
2000-02-19	2	6th	25 28 37 51 54 81
2000-02-12	9	5th	4 33 67 71 81 82
2000-01-12	15	6th	3 15 48 74 76 81
1999-11-20	1	6th	20 31 45 62 76 81
1999-11-17	7	6th	6 51 73 78 80 81
1999-10-23	14	6th	24 46 57 73 79 81
1999-09-04	6	6th	38 40 41 69 76 81
1999-08-14	28	5th	45 64 73 80 81 85
1999-05-08	1	6th	11 14 15 30 68 81
1999-05-05	11	5th	3 10 28 71 81 88
1999-03-27	1	5th	7 18 27 80 81 83
1999-03-24	14	6th	4 26 34 61 76 81
1999-02-03	16	5th	45 67 70 80 81 89
1998-12-09	8	6th	1 11 42 43 61 81
1998-11-11	2	5th	19 38 60 80 81 90
1998-11-04	30	5th	6 54 72 75 81 87
1998-07-22	14	5th	56 71 75 78 81 85
1998-06-03	3	4th	48 50 80 81 84 87
1998-05-23	3	6th	7 12 24 37 58 81
1998-05-13	2	5th	6 15 41 57 81 83
1998-05-06	7	5th	5 28 33 64 81 84
1998-04-11	13	6th	23 58 64 67 79 81
1998-02-25	9	4th	1 27 40 81 82 85
1998-01-24	11	6th	3 4 39 43 56 81
1997-12-17	—	5th	10 65 77 80 81 86