diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index ced21a6d72af1..673ac55e47612 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -547,19 +547,19 @@ interface Number {
 
     /**
      * Returns a string representing a number in fixed-point notation.
-     * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+     * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 100, inclusive.
      */
     toFixed(fractionDigits?: number): string;
 
     /**
      * Returns a string containing a number represented in exponential notation.
-     * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+     * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 100, inclusive.
      */
     toExponential(fractionDigits?: number): string;
 
     /**
      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
-     * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
+     * @param precision Number of significant digits. Must be in the range 1 - 100, inclusive.
      */
     toPrecision(precision?: number): string;