This tool generates a list of composite numbers based on how many you want. Composite numbers are integers greater than 1 that are not prime they have more than two factors. For example, 4, 6, 8, and 9 are all composite.
The output updates instantly as you type. You can switch between line-by-line or inline format, choose whether to show index numbers, and export or copy the list with a click.
How to Use:
- Enter how many composite numbers you want to generate.
- Toggle the format:
- Choose between line-by-line or inline display
- Turn index numbers on or off
- The output will update live as you change values.
- Click “Copy Output” to copy the results.
- Click “Export to File” to download the output as a
.txtfile. - Use “Clear All” to reset the input and output.
What Generate Composite Numbers can do:
This tool checks each number starting from 4 and includes it if it’s divisible by any number other than 1 and itself. It skips over primes and only returns numbers that have more than two positive divisors. With each change, the output flashes and updates immediately.
You can format the display for readability, toggle index numbers for tracking, and use the counter below to confirm the exact number of results.
Example:
Input:
20Settings: Line-by-line: ON, Show index: OFF
Output:
4
6
8
9
10
12
14
15
16
18
20
21
22
24
25
26
27
28
30
32Common Use Cases:
Use this tool to study number classification, prepare math examples, test algorithms that exclude primes, or quickly generate a list of non-prime integers. Whether you’re teaching, developing, or just exploring number properties, it delivers exactly what you need-fast, clear, and ready to copy or export.
Useful Tools & Suggestions:
Once you’ve got your composite list, Test If a Number Is Abundant is a great next step it helps you explore which ones have especially rich divisor sets. And if you’re comparing against simpler values, Generate Prime Numbers keeps things minimal and indivisible.