Randomizer

Random Number Generator

Mersenne Twister randomization algorithm

Basic
Generate		random numbers
between		and
Advanced
Delimiter		Default: comma+space
Sort low to high	All numbers unique	Generate report & options

About this randomizer

Developed by Michael Ivanov, Ph.D., this randomizer employs Mersenne Twister randomization algorithm by calling PHP mt_rand() function. The algorithm is commonly used in statistical software, such as SPSS. The validity of this algorithm can also be tested by generating a bitmap image using the same function. To test, use your browser's reload button as many times as you want to reload the image. If you observe a pattern in the image (highly unlikely), the numbers are not truly random. Alternatively, you are welcome to try another randomizer that uses Atmospheric noise algorithm by clicking here.

Examples

Assign 60 cases into 2 groups:

Number your cases from 1 to 60
Enter: Generate 30 random numbers between 1 and 60
Check: "Sort low to high" & "All numbers unique"
The generated 30 numbers will be your 1st group. The remaining cases will be your 2nd group

Assign 60 cases into 3 groups:

Number your cases from 1 to 60
Enter: Generate 60 random numbers between 1 and 60
Check: "All numbers unique"
The first 20 numbers will be your 1st group, the second 20 will be your 2nd group, and the last 20 will be your third group

Raffle drawing for 60 participants:

Number your cases from 1 to 60
Enter: Generate 1 random number between 1 and 60
If n number of prizes to be drawn, Enter: Generate n random numbers & Check: "All numbers unique"

More randomization resources

Collection of links related to randomization
Wiki articles on Mersenne Twister and Atmospheric noise
This randomizer can generate multiple sets (Randomization via Math.random function of JavaScript)

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