Big Random Number Generator
Generate extra-long random numbers with a fixed digit count. Every digit is produced as text, so a 50-digit result stays exact — no floating-point rounding.
Digits:
How Many:
Separator:
Generated Number
Download CSV
| Group | Digits | Generated Number |
|---|
Introduction to the tool and how to use it
Long Number Generator creates random numbers with a large number of digits — handy for test data, card/account-style samples or inputs for big-number maths.
Steps:
1. Set Digits — how many digits each number should have, e.g. 50;
2. Set Count — how many numbers to generate;
3. Optionally tick "Allow leading zero": left unticked the first digit is picked from 1-9 so a result never looks one digit short; ticked, the first digit may be 0 so you can produce numbers starting with zero;
4. Optionally tick "Keep unique" — results are pairwise distinct (with very few digits the pool is small, so it does its best);
5. Set the separator — the default \n means one number per line; use a comma to get a single line;
6. Click Run. Results appear in the text box and in the table below (index / digits / number, copyable in place), with CSV export.
Note: every digit is generated as text with no floating-point maths, so a 50- or 100-digit result stays exact instead of losing precision after 16 digits. To keep the page responsive the total output is capped at about 200,000 characters — the count is reduced automatically and you are notified.
Steps:
1. Set Digits — how many digits each number should have, e.g. 50;
2. Set Count — how many numbers to generate;
3. Optionally tick "Allow leading zero": left unticked the first digit is picked from 1-9 so a result never looks one digit short; ticked, the first digit may be 0 so you can produce numbers starting with zero;
4. Optionally tick "Keep unique" — results are pairwise distinct (with very few digits the pool is small, so it does its best);
5. Set the separator — the default \n means one number per line; use a comma to get a single line;
6. Click Run. Results appear in the text box and in the table below (index / digits / number, copyable in place), with CSV export.
Note: every digit is generated as text with no floating-point maths, so a 50- or 100-digit result stays exact instead of losing precision after 16 digits. To keep the page responsive the total output is capped at about 200,000 characters — the count is reduced automatically and you are notified.
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