diff --git a/src/functions.js b/src/functions.js
index 2684e47..0932634 100755
--- a/src/functions.js
+++ b/src/functions.js
@@ -1,7 +1,7 @@
 // functions.js
 export function primeFactorization(input) {
   if (input === null || input === undefined || input === "") {
-    return "No prime factors";
+    return "Please enter a number";
   }
 
   // Accept number | string | bigint
@@ -55,10 +55,13 @@ export function primeFactorization(input) {
     .join(" * ");
 }
 
+// Generate all primes up to a given limit using the Sieve of Eratosthenes
 export function generatePrimes(limit) {
   // Same as before; limit is a small Number (e.g., 1000)
   const n = Math.floor(Number(limit));
-  if (n < 2 || !Number.isFinite(n)) return [];
+  if (n < 2 || !Number.isFinite(n)) {
+    return [];
+  }
   const sieve = Array(n + 1).fill(true);
   sieve[0] = sieve[1] = false;
   for (let i = 2; i * i <= n; i++) {
diff --git a/tests/Functions.test.js b/tests/Functions.test.js
index 1e6c202..c251e1d 100755
--- a/tests/Functions.test.js
+++ b/tests/Functions.test.js
@@ -25,6 +25,18 @@ describe("primeFactorization", () => {
     expect(primeFactorization(0)).toBe("No prime factors");
     expect(primeFactorization(-5)).toBe("No prime factors");
   });
+
+  it("should handle BigInt input", () => {
+    expect(primeFactorization(12345678901234567890n)).toBe(
+      "2 * 3<sup>2</sup> * 5 * 101 * 3541 * 3607 * 3803 * 27961",
+    );
+  });
+
+  it("should handle string input", () => {
+    expect(primeFactorization("56")).toBe("2<sup>3</sup> * 7");
+    expect(primeFactorization("97")).toBe("97");
+    expect(primeFactorization("not a number")).toBe("No prime factors");
+  });
 });
 
 describe("generatePrimes", () => {
@@ -48,4 +60,9 @@ describe("generatePrimes", () => {
     expect(generatePrimes(0)).toEqual([]);
     expect(generatePrimes(-10)).toEqual([]);
   });
+
+  it("should handle non-integer limits", () => {
+    expect(generatePrimes(10.7)).toEqual([2, 3, 5, 7]);
+    expect(generatePrimes(15.2)).toEqual([2, 3, 5, 7, 11, 13]);
+  });
 });
diff --git a/tests/test.setup.js b/tests/test.setup.js
index 47c7ab4..fc9908c 100644
--- a/tests/test.setup.js
+++ b/tests/test.setup.js
@@ -1,2 +1,8 @@
-import { randomUUID } from "node:crypto"; // Node.js built-in crypto
-global.crypto = { randomUUID }; // Mock or polyfill necessary crypto functions
+import { randomUUID } from "node:crypto";
+
+if (!globalThis.crypto?.randomUUID) {
+  Object.defineProperty(globalThis, "crypto", {
+    value: { randomUUID },
+    configurable: true,
+  });
+}