Factorial Calculator
Compute n! exactly — even for huge numbers — with digits count. Calculate the factorial of any number up to 5000 with exact big-integer arithmetic. Shows trailing zeros and digit count. Free online factorial tool.
À propos de Factorial Calculator
The factorial n! — the product of all integers from 1 to n — explodes quickly: 10! is already 3.6 million and 70! exceeds the capacity of a normal calculator. This tool uses arbitrary-precision arithmetic to compute exact factorials of n up to 5000, showing every digit, the total digit count and the number of trailing zeros (a classic competitive-programming question). Perfect for combinatorics homework, probability and interview prep.
Comment utiliser Factorial Calculator
- Enter n (0 to 5000).
- The exact factorial appears instantly.
- Check digit count and trailing zeros.
- Copy the full number when needed.
Fonctionnalités clés
- Exact results using big-integer arithmetic
- Factorials up to n = 5000
- Trailing-zero count and total digits shown
- Combinations-style explanation included
What is 0 factorial and why?
How many trailing zeros does 100! have?
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