[Term Entry] JavaScript Number Methods: .MIN_SAFE_INTEGER

* This is the first draft for Number.MIN_SAFE_INTEGER

* minor fixes

* Update MIN-SAFE-INTEGER.md

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Author: ptothhu

content/javascript/concepts/number-methods/terms/MIN-SAFE-INTEGER/MIN-SAFE-INTEGER.md

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+---
+Title: '.MIN_SAFE_INTEGER'
+Description: 'Represents the smallest safe integer in JavaScript, below which integer precision is not guaranteed.'
+Subjects:
+  - 'Computer Science'
+  - 'Web Development'
+Tags:
+  - 'Integers'
+  - 'JavaScript'
+  - 'Numbers'
+CatalogContent:
+  - 'introduction-to-javascript'
+  - 'paths/front-end-engineer-career-path'
+---
+
+In JavaScript, the **`.MIN_SAFE_INTEGER`** property is a static constant that represents the smallest safe integer in JavaScript: `-(2^53 - 1)` or `-9007199254740991`. JavaScript uses the IEEE-754 double-precision format for all numbers, meaning not all integers can be represented exactly. A safe integer is one that:
+
+- Can be precisely represented
+- Doesn’t lose precision during arithmetic
+- Can be accurately compared
+
+Since JavaScript is dynamically typed, all numbers fall under the `Number` type and are treated as floating-point values. `.MIN_SAFE_INTEGER` isn’t tied to any variable as it’s accessed directly via `.MIN_SAFE_INTEGER`. Values smaller than this limit may suffer from rounding errors or incorrect comparisons due to floating-point precision limits.
+
+## Syntax
+
+```pseudo
+Number.MIN_SAFE_INTEGER
+```
+
+**Parameters:**
+
+`.MIN_SAFE_INTEGER` is a static property of the Number object. It's accessed directly without calling a function or passing arguments.
+
+**Return value:**
+
+It returns a number: `-9007199254740991`. This is the smallest integer JavaScript can represent safely without precision loss using the `Number` type (IEEE-754 double-precision).
+
+## Example
+
+In this example, subtracting beyond the minimum safe integer leads to precision loss, causing distinct values to compare as equal:
+
+```js
+console.log(Number.MIN_SAFE_INTEGER);
+
+const a = Number.MIN_SAFE_INTEGER - 1;
+const b = Number.MIN_SAFE_INTEGER - 2;
+
+console.log(a === b);
+```
+
+The output of this code is:
+
+```shell
+-9007199254740991
+true
+```
+
+This demonstrates what happens when values go below the minimum safe integer. Although `a` and `b` should be distinct (`-9007199254740992` and `-9007199254740993`), both are stored as the same value due to floating-point precision limits. So, `a === b` returns `true`, even though they are not mathematically equal.
+
+## Codebyte Example
+
+In this codebyte example, `.isSafeInteger()` is used to check if a value just below the minimum safe integer is still considered safe:
+
+```codebyte/javascript
+console.log("Minimum safe integer in JavaScript:");
+console.log(Number.MIN_SAFE_INTEGER);
+
+const unsafeValue = Number.MIN_SAFE_INTEGER - 1;
+console.log("Unsafe value:", unsafeValue);
+
+console.log("Is unsafeValue a safe integer?");
+console.log(Number.isSafeInteger(unsafeValue));
+```