How to Represent Large Binary Numbers in JavaScript?

Find out how to represent really large binary numbers in JavaScript

If you have a really large binary number (that exceeds the Number.MAX_SAFE_INTEGER value), then you can store it as the BigInt primitive data type.

For example, if you're using the ES6 binary number syntax, then you could do the following:

// ES6+
const largeBinNum = BigInt(0b11111111111111111111111111111111111111111111111111111);

console.log(largeBinNum); // 9007199254740991n

Similarly, if you're using a binary string, then you could do the following:

const largeBinNum = BigInt('11111111111111111111111111111111111111111111111111111');

console.log(largeBinNum); // 9007199254740991n

Please note that the "n" at the end of the result merely suggests that the resulting number is a bigint primitive. You can easily convert it to a string or a number.

Please note that a BigInt value cannot be used with the Math object methods and cannot be mixed with a Number value in operations. For that, you must coerce the value into the same type. However, be aware that coercing values back and forth might mean that the precision of a BigInt value may be lost when it is coerced to a Number value.


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