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Big Number Calculator

Exact results for numbers far beyond what a normal calculator can hold.

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Big Number Calculator

Exact math on numbers with thousands of digits

Whole numbers or decimals. E notation like 1.5e40 works too.

X × Y

1.21932631137 × 10⁵⁸

Shown in scientific notation; every digit is listed below.

Scientific notation
1.219326311 × 10⁵⁸
Digits
59

How it was calculated

  1. Exact value: 12193263113702179522496570642249657064223746380111126352690
  2. With separators: 12,193,263,113,702,179,522,496,570,642,249,657,064,223,746,380,111,126,352,690
  3. Exact result (59 digits):
  4. 12193263113702179522496570642249657064223746380111126352690

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How the big number calculator works

Ordinary calculators store about 15 significant digits, so large results get rounded. This calculator works on the digits themselves (arbitrary precision), so 50! or a 200-digit product comes out exact.

Addition, subtraction, multiplication, whole-number powers, factorials, mod, GCD and LCM are exact. Division and square roots can go on forever, so they are rounded to the number of decimal places you choose (up to 1,000).

GCD is the greatest common divisor, found with Euclid's algorithm. LCM is the least common multiple, |X × Y| ÷ GCD. X mod Y is the remainder after dividing X by Y, with the sign of X.

Using and checking your result

Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.

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Frequently asked questions