Math calculators
Number Theory Calculators
11 tools
GCF, LCM, factorial, permutations and combinations, Euclidean remainder, modular inverse, sequences, and prime factorization. Tools may appear in more than one topic.
Popular in Number Theory & Discrete Math
Featured tools from the Family registry.
- GCF Calculator Find the GCF, GCD, or HCF of two or more integers, including exact 48-digit values. See Euclidean steps, factor checks, and complete exports. Free, no sign-up.
- LCM Calculator Find the LCM or LCD of two or more integers, including exact 48-digit inputs. Compare methods, read full working, and share or export results. Free, no sign-up.
- Factorial Calculator Calculate factorials from 0! to 5000! locally. See digit counts and product steps, share inputs, and export every digit with versioned JSON or CSV results.
All Number Theory & Discrete Math
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- Arithmetic Sequence Calculator Find an exact integer arithmetic sequence term and finite sum from the first term, common difference and index. Check limits, worked steps and full exports.
- Factorial Calculator Calculate factorials from 0! to 5000! locally. See digit counts and product steps, share inputs, and export every digit with versioned JSON or CSV results.
- Fibonacci Calculator Calculate exact Fibonacci numbers from F₀ = 0 and F₁ = 1 through index 1000. View the preceding term, partial sum, worked steps and complete integer exports.
- GCF Calculator Find the GCF, GCD, or HCF of two or more integers, including exact 48-digit values. See Euclidean steps, factor checks, and complete exports. Free, no sign-up.
- Geometric Sequence Calculator Find exact integer geometric sequence terms and finite sums, including zero, one and negative ratios. Check input limits, worked steps and complete exports.
- LCM Calculator Find the LCM or LCD of two or more integers, including exact 48-digit inputs. Compare methods, read full working, and share or export results. Free, no sign-up.
- Modular Inverse Calculator Find exact modular inverses for coprime signed integers up to 48 digits. Check the original Bézout identity, reject invalid inputs, and export complete results.
- Modulo Calculator Find exact Euclidean quotients and remainders for signed integers up to 48 digits. Check identities, calculate modular inverses, and share complete results.
- Permutation Combination Calculator Calculate exact permutations and combinations for 0 ≤ k ≤ n ≤ 1000. Compare ordered and unordered selections, share inputs, and export the complete count.
- Prime Factorization Calculator Find exact prime factors and test primality for integers from 1 to 10^12. Check exponents, view complete factorization steps, and export or share results.
- Sequence Calculator Calculate exact integer terms and sums for arithmetic, geometric, Fibonacci and linear recurrence sequences. Check indices, limits, examples and full exports.