Big Number Calculator
Free big number calculator. Exact BigInt arithmetic beyond Number.MAX_SAFE_INTEGER: factorials up to 5000, integer powers to 100,000 digits, sums, products and floor division with remainder, with thousands separators and digit statistics.
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What is Big Number Calculator?
The Big Number Calculator computes with JavaScript BigInt, so factorials, integer powers and arithmetic on huge integers stay exact no matter how many digits they grow. Fifty factorial keeps all 65 digits, crypto-size products keep every bit, and floor division shows the exact remainder. Results come with thousands separators plus digit-count and digit-sum statistics for quick checksums, and inputs tolerate spaces, commas and underscores.
Key Benefits
- Exact results where ordinary calculators silently round
- Factorials and powers with every digit preserved
- Floor division with the exact remainder for modular checks
- Digit-count and digit-sum statistics for sanity checking
- Forgiving input with separators, running entirely offline
Common Use Cases
- •Checking combinatorics and probability homework with huge answers
- •Verifying crypto-key-size powers like 2 to the 256th
- •Multiplying hash values or long identifiers without precision loss
- •Exploring how fast factorials and towers of exponents grow
- •Sanity-checking very long numbers copied between systems
How to Calculate with Huge Numbers
- Compute a factorial: Type n in the factorial box. Results up to 5000 factorial keep every digit, so you can count the digits of 100! or 1000! exactly.
- Raise to a power: Enter any integer base and exponent. Powers up to 100,000 digits are computed exactly, which covers cryptographic key sizes and nested squaring.
- Run exact arithmetic: Paste two big integers and pick add, subtract, multiply or floor divide. Division shows the exact remainder, so modular-style homework checks work directly.
Key Features
- Exact BigInt arithmetic: add, subtract, multiply and floor divide with remainder
- Factorials up to 5000 with every digit preserved
- Integer powers up to 100,000 digits
- Thousands separators plus digit-count and digit-sum statistics
- Input that tolerates spaces, commas and underscores