Illinois Lotto Clustering Distribution

  Number Frequency   Extra Shot Frequency   Overdue Numbers   Odd/Even Numbers   High/Low Numbers   Sum and Root Sum   Hot and Cold Numbers   Most Common Pairs   Most Common Triplets   Most Common Quadruplets   Most Common Quintupletss   Mean, STDEV, and Range Trend   Mean Distribution   Range Distribution   STDDEV Distribtion   IQR Distribution   Clustering Distribution
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 Latest Draw Result
  Number Frequency   Extra Shot Frequency   Overdue Numbers   Odd/Even Numbers   High/Low Numbers   Sum and Root Sum   Hot and Cold Numbers   Most Common Pairs   Most Common Triplets   Most Common Quadruplets   Most Common Quintupletss   Mean, STDEV, and Range Trend   Mean Distribution   Range Distribution   STDDEV Distribtion   IQR Distribution   Clustering Distribution

This page explores how often drawn numbers appear close together or in consecutive sequences. It helps us see whether number grouping occurs as expected in a random lottery environment.

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Last 75 draws
From May. 31, 2025 To Nov. 20, 2025

Histogram of Number Clustering

The histogram of number clustering measures the typical spacing between consecutive numbers in lotto draws. Each bin represents a range of average gaps, showing whether numbers tend to cluster closely together or spread evenly across the draw. This histogram helps analysts detect patterns in number spacing, complementing other perspectives such as sums and ranges.

The histogram of average gaps between consecutive numbers in lotto draws reveals that the most frequent gap interval is 7-8 with 25 occurrences, suggesting a strong clustering in this interval. In contrast, the least frequent gap interval is 1-2 with 0 occurrences, showing it is rarely observed. This indicates a noticeable concentration of draws around certain gap intervals. Overall, the distribution shows clustering around specific gap intervals, indicating that draws tend to gravitate toward these values.

Format Changes in Illinois Lotto

The Illinois Lotto has undergone several format changes below since its launch to enhance gameplay:

Period Format Extra Shot
February 19, 1983 6/40 None
May 13, 1984 6/44 None
April 15, 1990 6/54 None
October 28, 1998 6/52 None
November 4, 2012 6/52 1/25
September 2021 6/50 1/25

How Illinois Lotto Format Changes Affect Your Number Strategy.

The format changes have a direct impact on statistical analysis. Mixing frequency data across different formats is not advisable because each version of the game has a different number pool and probability structure.

For example, a number that appeared frequently in the 6/50 format may have done so due to higher individual draw probability, but that same frequency can be misleading in the 6/52 and 6/54 format.

Therefore, for meaningful analysis, it’s essential to treat each format as its own distinct dataset. Analyzing trends or frequencies should be restricted to results from within the same format period, especially if the goal is to inform number selection in the current game structure.

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