diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
index 2449150..7272bea 100644
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -1,9 +1,9 @@
 ## DESCRIPTION
 
 Nombre:
-Usuario Platzi:
+Usuario
 
-## Reto:
+## Reto
 
 - [ ] Primer problema
 - [ ] Segundo problema
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..159786d 100644
--- a/src/factorial.js
+++ b/src/factorial.js
@@ -1,5 +1,16 @@
 const factorial = (number) => {
-  // your code here
+  
+  if(number === 0){
+    return 1;
+  }
+
+  for(let i = number - 1; i > 0; i--){
+    number *= i
+  }
+
+  return number
+  
+
 }
 
 module.exports = factorial;
\ No newline at end of file
diff --git a/src/fibonacci.js b/src/fibonacci.js
index ea3270f..c346722 100644
--- a/src/fibonacci.js
+++ b/src/fibonacci.js
@@ -1,5 +1,17 @@
 const fibonacci = (n) => {
-  // your code here
+  let array = [0,1]
+  
+	if(n < 2){
+    return [n]
+  }
+  
+	for(let i = 1; i < n; i++){
+    array.push(array[i] + array[i - 1])
+  }
+  
+  array.shift()
+  
+  return array
 }
 
 module.exports = fibonacci;
\ No newline at end of file
diff --git a/src/primalidad.js b/src/primalidad.js
index 8bdb849..139ea9f 100644
--- a/src/primalidad.js
+++ b/src/primalidad.js
@@ -1,5 +1,17 @@
 const trialDivision = (number) => {
-  // your code here
+
+    if (number <= 1 || !Number.isInteger(number)){
+      return false
+    }
+  
+  	for(let i = number - 1; i > 1; i--){
+      if(number % i === 0){
+        return false
+      }
+    }
+  
+  return true
+
 }
 
 module.exports = trialDivision;
\ No newline at end of file