This chart shows the Number Sum and Root Sum. The Number Sum is the sum of calculating the numbers in a combination of a draw result and reduce it to a single digit called "root sum". E.g., a combination of numbers 7, 8, 5, 3, 2, and 1 has a sum of 26. The root sum is 2+6 = 8. If the root sum is more than 1 digit, the root sum is computed again. Analyzing these values over time can sometimes reveal trends in sum totals that appear more frequently.
Number Sum Frequency
The graph below illustrates the trends of both the number sum and the root sum over a specified period of lottery draws. Each point on the chart represents the respective values for a single draw, allowing for a clear visual comparison of how these two metrics fluctuate over time. The number sum, typically representing the total of all drawn numbers, while the root sum—derived by reducing the number sum to a single-digit value. Together, these lines help highlight any emerging patterns, anomalies, or correlations between the overall sum of numbers and their root values throughout the analyzed period.
Most Common Number Sum
The table below displays the most frequently occurring number sums within the analyzed set of draws. It is organized into two columns: the first column lists the distinct number sums observed, while the second column shows the corresponding count of draws in which each sum appeared. This format makes it easy to identify which number sums occur most often, providing insight into potential patterns or biases in the draw outcomes. By examining this table, one can quickly determine which sums are statistically more common and may be worth monitoring in future draws.
| Number Sum | Draw Count | |
|---|---|---|
| 154 |
|
3 |
| 200 |
|
3 |
| 165 |
|
2 |
| 151 |
|
2 |
| 194 |
|
2 |
| 118 |
|
2 |
| 164 |
|
2 |
| 171 |
|
2 |
| 202 |
|
2 |
| 178 |
|
2 |
| 180 |
|
2 |
| 156 |
|
2 |
| 177 |
|
2 |
| 197 |
|
2 |
| 163 |
|
2 |
| 204 |
|
2 |
| 306 |
|
1 |
| 176 |
|
1 |
| 230 |
|
1 |
| 233 |
|
1 |
| 187 |
|
1 |
| 270 |
|
1 |
| 161 |
|
1 |
| 152 |
|
1 |
| 166 |
|
1 |
| 139 |
|
1 |
| 254 |
|
1 |
| 183 |
|
1 |
| 326 |
|
1 |
| 125 |
|
1 |
| 188 |
|
1 |
| 196 |
|
1 |
| 107 |
|
1 |
| 150 |
|
1 |
| 159 |
|
1 |
| 223 |
|
1 |
| 126 |
|
1 |
| 236 |
|
1 |
| 153 |
|
1 |
| 127 |
|
1 |
| 228 |
|
1 |
| 179 |
|
1 |
| 214 |
|
1 |
| 124 |
|
1 |
| 257 |
|
1 |
| 181 |
|
1 |
| 122 |
|
1 |
| 123 |
|
1 |
| 242 |
|
1 |
| 160 |
|
1 |
| 144 |
|
1 |
| 132 |
|
1 |
| 116 |
|
1 |
| 146 |
|
1 |
| 141 |
|
1 |
| 78 |
|
1 |
| 226 |
|
1 |
Most Common Root Sum Summary
The table and graph below presents the most common root sums observed across the analyzed draws. The table includes two columns: one for the root sum values—each derived by reducing the number sum to a single digit—and another indicating the number of draws in which each root sum occurred. This allows for easy identification of the most frequent root sums. While the pie chart visually represents the distribution of root sums, offering a clear and immediate view of how evenly or unevenly these values are spread across all draws.
| Root Sum | Draw Count | |
|---|---|---|
| 1 |
|
10 |
| 2 |
|
9 |
| 3 |
|
6 |
| 4 |
|
4 |
| 5 |
|
6 |
| 6 |
|
10 |
| 7 |
|
10 |
| 8 |
|
11 |
| 9 |
|
9 |
Format Changes in US Mega Millions Lottery
Since its inception in 1996, Mega Millions has undergone several changes in its number pool format, particularly in the main number set and the Mega Ball. Initially launched as “The Big Game,” the format started with selecting 5 numbers from a pool of 50 and 1 Mega Ball from a pool of 25 and expanded its number matrix several times in 2005, 2013, and 2017. in April 2025, the format was revised again, maintaining the 5/70 for the main numbers but slightly reducing the Mega Ball pool from 1/25 to 1/24. These adjustments over time have been aimed at balancing jackpot size, odds of winning, and overall game excitement.
| Period | Format | Mega Ball |
|---|---|---|
| September 6, 1996 – Launch as “The Big Game” | 5 of 50 | 1 of 25 |
| May 17, 2002 – Rebranded “The Big Game Mega Millions” | 5 of 52 | 1 of 52 |
| October 2002 – 2005 | 5 of 56 | 1 of 46 |
| October 18–22, 2013 | 5 of 75 | 1 of 15 |
| October 28–31, 2017 | 5 of 70 | 1 of 25 |
| April 8, 2025 | 5 of 70 | 1 of 24 |
How US Mega Millions Lotto Format Changes Affect Your Number Strategy.
These 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 5/50 format may have done so due to higher individual draw probability, but that same frequency can be misleading in the 5/75 or 5/70 formats.
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.