# Number Combination Duplicate Finder

Paste multiple number combinations and find which numbers repeat across the whole set, with occurrence counts and group positions.

> Canonical page: https://elysiatools.com/en/tools/number-combination-duplicate-finder

- **Category:** Data Processing

- **Keywords:** duplicate numbers, number combinations, frequency counter, repeat finder, lottery numbers, group analysis

## Overview

Analyze repeated numbers across multiple combinations.

Enter one combination per line, such as lottery picks, candidate sets, shortlist codes, or manually grouped numbers. The tool extracts numeric tokens from each line, counts repeated values, and can show exactly which group numbers each duplicate appeared in.

## Inputs

- **Number Combinations** (textarea): 01 12 18 26 33 05 12 22 26 40 07 09 12 18 45
- **Minimum Occurrences** (number)
- **Sort By** (select)
- **Output Format** (select)
- **Include Group Positions** (checkbox)
- **Count Repeats Inside The Same Group** (checkbox)

## When to use

- When analyzing historical lottery draws or ticket combinations to find recurring numbers.
- When auditing numeric datasets, candidate lists, or shortlist codes for overlapping values across groups.
- When checking manually grouped numeric data to identify cross-group redundancies or common elements.

## How it works

- Paste your number combinations into the input area, entering one combination per line.
- Set your minimum occurrence threshold and choose whether to count duplicates within the same group.
- Select your preferred sorting method and output format, such as a readable report, JSON, or CSV.
- Click generate to extract numeric tokens, count frequencies, and view the group positions of each duplicate.

## Use cases

- Identifying frequently drawn numbers across multiple lottery ticket selections.
- Cross-referencing numeric product IDs or SKU shortlists across different inventory categories.
- Finding overlapping participant IDs or candidate codes across multiple test groups.

## Frequently asked questions

### How do I separate numbers in a combination?

You can separate numbers using spaces, commas, or other standard delimiters, with one combination per line.

### Can I find numbers that repeat within a single line?

Yes, by enabling the option to count repeats inside the same group.

### What output formats are supported?

The tool can output results as a readable text report, a structured JSON summary, or a CSV table.

### Can I filter out numbers that only repeat once or twice?

Yes, you can adjust the minimum occurrences setting to only show numbers that repeat above your chosen threshold.

### How are group positions tracked?

Each line of input is treated as a group, and the output lists the line numbers where the duplicate numbers were found.

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## Samples

- [Duplicate Line Samples](https://elysiatools.com/en/samples/text-duplicate-line-samples): Sample files with various types of duplicate lines for testing duplicate removal tools
- [EU VAT Number Samples](https://elysiatools.com/en/samples/eu-vat): Collection of EU VAT numbers from all member states for validation testing
- [Global Phone Number Samples](https://elysiatools.com/en/samples/global-phone): Collection of phone numbers from various countries for validation testing
- [Phone Number Extractor Samples](https://elysiatools.com/en/samples/phone-number-extractor): Collection of mixed text containing phone numbers from various countries for extraction testing