Added explicit check for scientific notation

src/compiler/checker.ts

@@ -33689,9 +33689,10 @@ namespace ts {
         }
 
         function checkNumericLiteralValueSize(node: NumericLiteral) {
+            // Scientific notation (e.g. 2e54 and 1e00000000010) can't be converted to bigint
             // Literals with 15 or fewer characters aren't long enough to reach past 2^53 - 1
             // Fractional numbers (e.g. 9000000000000000.001) are inherently imprecise anyway
-            if (node.text.length <= 15 || node.text.indexOf(".") !== -1) {
+            if (node.numericLiteralFlags & TokenFlags.Scientific || node.text.length <= 15 || node.text.indexOf(".") !== -1) {
                 return;
             }
 

tests/cases/fourslash/codeFixUseBigIntLiteral.ts

@@ -18,6 +18,7 @@
 ////2e52;
 ////2e53;
 ////2e54;
+////1e00000000010;
 
 verify.codeFix({
   description: ts.Diagnostics.Convert_to_a_bigint_numeric_literal.message,
@@ -41,7 +42,8 @@ verify.codeFix({
 -0x20000000000001;
 2e52;
 2e53;
-2e54;`
+2e54;
+1e00000000010;`
 });
 
 verify.codeFixAll({
@@ -66,5 +68,6 @@ verify.codeFixAll({
 -0x20000000000001n;
 2e52;
 2e53;
-2e54;`
+2e54;
+1e00000000010;`
 });