Number.MINSAFEINTEGER

## Value

`-9007199254740991` (-9,007,199,254,740,991, or about -9 quadrillion).

{{js_property_attributes(0, 0, 0)}}

## Description

[Double precision floating point format](https://en.wikipedia.org/wiki/Double_precision_floating-point_format) only has 52 bits to represent the [mantissa](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number#number_encoding), so it can only safely represent integers between -(2<sup>53</sup> – 1) and 2<sup>53</sup> – 1. Safe in this context refers to the ability to represent integers exactly and to correctly compare them. For example, `Number.MIN_SAFE_INTEGER - 1 === Number.MIN_SAFE_INTEGER - 2` will evaluate to true, which is mathematically incorrect. See {{jsxref("Number.isSafeInteger()")}} for more information.

As mentioned in {{jsxref("Number.EPSILON")}}, the precision of numbers depends on their magnitude. `Number.MIN_SAFE_INTEGER` represents the smallest value at which integer-level operations can be performed precisely, but you can still perform meaningful arithmetic on numbers more negative than that, just without integer-level precision. The largest representable number in JavaScript is actually {{jsxref("Number.MAX_VALUE")}}, which is approximately 1.7976931348623157 × 10<sup>308</sup>.

Because `MIN_SAFE_INTEGER` is a static property of {{jsxref("Number")}}, you always use it as `Number.MIN_SAFE_INTEGER`, rather than as a property of a number value.

## Examples

### Using MIN_SAFE_INTEGER

```js
Number.MIN_SAFE_INTEGER; // -9007199254740991
-(2 ** 53 - 1); // -9007199254740991