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Lotto 6/45 Draw 1105: Winning Numbers and Probability Explained

Winning numbers and bonus number

  1. 6
  2. 16
  3. 34
  4. 37
  5. 39
  6. 40
  7. 11

The six winning numbers on 2024-02-03 were 6, 16, 34, 37, 39, 40 and the bonus number was 11. The bonus number only decides second prize, so it is left out of the number-feature calculations below.

First and second prize and the amount after tax

15 players won first prize, KRW 1,834,853,800 each (about KRW 1.83 billion). Applying the current tax rules, the amount after tax is about KRW 1,262,352,046 per winner. Second prize went to 83 players, KRW 55,266,681 each, about KRW 43,108,012 after tax.

Prize results of draw 1105
PrizeWinnersPer winnerAfter tax (reference)
1st15KRW 1,834,853,800KRW 1,262,352,046
2nd83KRW 55,266,681KRW 43,108,012
3rd2,898KRW 1,582,863—
4th148,700KRW 50,000—
5th2,503,114KRW 5,000—

The after-tax figures apply the current rules (income tax withheld at 20%, 30% on the part above KRW 300 million, local income tax of 10% of that, nothing withheld at KRW 2 million or less) to this draw's prize with no purchase cost deducted. The rules in force at the time may have differed. The method is the same as in the prize tax calculator.

Sales in this draw were KRW 113,295,292,000. The five prize levels together paid KRW 56,647,648,497, which is 50.0% of sales. The share varies by draw, for example when a jackpot with no winner is carried to a later draw.

Was the number of first-prize winners ordinary?

113,295,292 games were sold in this draw. If every game were chosen independently at random, the expected number of first-prize winners would be 13.91 (games sold ÷ 8,145,060). The actual number was 15.

Comparison with the Poisson model
ExpectedActualP(X = 15)P(X ≥ 15)
13.91159.83%42.0%

15 winners is an ordinary result, close to what the model expects. A count of 15 or more has a probability of 42.0%, about once every 2.4 rounds.

The Poisson distribution is an approximation. In practice many people choose similar numbers, such as birthdays, so the real count varies more than the model says. The model probability is a yardstick only and says nothing about which numbers come up. See How many Lotto 6/45 jackpot winners should each round have? for the full explanation.

Cumulative comparison

Rounds 88 to 1105 (1018 rounds): the distribution of first-prize winner counts (bars) against the Poisson expectation for the same rounds (line).

First-prize winner counts versus the Poisson expectationBars are actual round counts; the line is the Poisson expectation: 0=3, 1=15, 2=30, 3=57, 4=92, 5=76, 6=109, 7=127, 8=113, 9=106, 10=58, 11=57, 12=30, 13=39, 14=25, 15=26, 16=15, 17=12, 18=7, 19=6, 20=6, 21=3, 22=1, 23=1, 24=0, 25=1, 26=0, 27=0, 28=1, 29=0, 30+=2032649512705101520253030+First-prize winners in a round

The variance of the deviations measured in model standard deviations is 1.55 (1 under a Poisson model). The real counts varied more than the model, in line with the clustering of purchases described above.

Features of the six numbers and their exact probabilities

The probabilities below come from counting all 8,145,060 ways to draw six distinct numbers exactly (no approximation). "Probability of this outcome" is the share of all combinations that have the same feature as this draw.

Features of the numbers in draw 1105
FeatureThis drawProbability of this outcome
Odd and even2 odd, 4 even22.7%
Low and high2 low (1–22), 4 high (23–45)25.1%
Neighbouring numbers1 neighbouring pair52.9%
Sum of the six172sum ≤ 172: 87.2%
sum ≥ 172: 13.5%
All six at most 31no (includes 32 or higher)91.0%

Every individual combination has the same 1 in 8,145,060 chance of being drawn. The shares above only show which shapes of combination are more numerous.

Context: how often each number was drawn

Appearances of each number from 1 to 45 among the six winning numbers (bonus excluded) over draws 1 to 1105 (1105 draws). If the draws are fully random, each number is expected 147.3 times with a standard deviation of about 11.3. The shaded band is the expectation plus or minus two standard deviations.

Appearances per number versus the theoretical expectationThe shaded band is the expectation plus or minus two standard deviations: 1=153, 2=142, 3=148, 4=147, 5=140, 6=145, 7=149, 8=141, 9=116, 10=147, 11=149, 12=161, 13=156, 14=159, 15=146, 16=146, 17=156, 18=165, 19=147, 20=153, 21=150, 22=133, 23=135, 24=148, 25=137, 26=149, 27=158, 28=135, 29=139, 30=137, 31=148, 32=129, 33=154, 34=168, 35=146, 36=148, 37=153, 38=149, 39=152, 40=157, 41=135, 42=142, 43=156, 44=147, 45=15904487131174151015202530354045Number

Chi-square goodness-of-fit test: χ² = 28.8, 44 degrees of freedom, p-value = 0.963. The p-value is at least 0.05, so the differences between numbers are within random variation.

Why this result tells you nothing about the next draw

Each draw starts from scratch as an independent trial. The drawing machine does not remember earlier rounds, so the numbers, the odd-even split, the sum and the winner count of this draw have no influence on the next one, and this result tells you nothing about it. Every combination has the same 1 in 8,145,060 chance in every draw. The figures on this page explain a draw that has already happened.

Source and collection time

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