diff --git a/Test_passed.png b/Test_passed.png
new file mode 100644
index 0000000..cadefbc
Binary files /dev/null and b/Test_passed.png differ
diff --git a/package-lock.json b/package-lock.json
index fd061e8..92817cd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,15 @@
 {
-  "name": "challenge-js-03",
+  "name": "javascript-challenges",
   "version": "1.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "name": "challenge-js-03",
+      "name": "javascript-challenges",
       "version": "1.0.0",
       "license": "MIT",
       "devDependencies": {
-        "jest": "^29.0.1"
+        "jest": "29.0.1"
       }
     },
     "node_modules/@ampproject/remapping": {
diff --git a/src/factorial.js b/src/factorial.js
index 4f3ae70..07d87ce 100644
--- a/src/factorial.js
+++ b/src/factorial.js
@@ -1,5 +1,10 @@
 const factorial = (number) => {
-  // your code here
+
+	let rta = 1;
+	for(let i = number; i>0; i--){
+	    rta *= i;
+	}
+	return(rta);
 }
 
 module.exports = factorial;
\ No newline at end of file
diff --git a/src/fibonacci.js b/src/fibonacci.js
index ea3270f..da555f7 100644
--- a/src/fibonacci.js
+++ b/src/fibonacci.js
@@ -1,5 +1,19 @@
 const fibonacci = (n) => {
-  // your code here
+  let fib = [];
+  for (let i = 0; i < n; i++) //[1,1+]
+  {
+  	if((i-2)<0)
+  	{
+  		fib.push(1);
+  	}
+  	else
+  	{
+  		fib.push(fib[i-2]+fib[i-1]);
+  	}
+  }
+
+  return(fib);
+
 }
 
 module.exports = fibonacci;
\ No newline at end of file
diff --git a/src/primalidad.js b/src/primalidad.js
index 8bdb849..7e80fe6 100644
--- a/src/primalidad.js
+++ b/src/primalidad.js
@@ -1,5 +1,16 @@
 const trialDivision = (number) => {
-  // your code here
+    if (number<=1 || Math.trunc(number)!=number ) 
+    {
+    	return false;
+    }
+    for (let i = 2; i <= Math.sqrt(number); i++)
+    {
+        if (number % i == 0) 
+        {
+        	return false;
+        }
+    }
+    return true;
 }
 
 module.exports = trialDivision;
\ No newline at end of file