diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
index 2449150..da0a081 100644
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -1,10 +1,10 @@
 ## DESCRIPTION
 
-Nombre:
-Usuario Platzi:
+Nombre: Jefrien Armando Alvizures Martínez
+Usuario Platzi: jefrien
 
 ## Reto:
 
-- [ ] Primer problema
-- [ ] Segundo problema
-- [ ] Tercer problema
+- [x] Primer problema
+- [x] Segundo problema
+- [x] Tercer problema
diff --git a/package-lock.json b/package-lock.json
index fd061e8..7f732fb 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": {
@@ -5144,8 +5144,7 @@
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/jest-pnp-resolver/-/jest-pnp-resolver-1.2.2.tgz",
       "integrity": "sha512-olV41bKSMm8BdnuMsewT4jqlZ8+3TCARAXjZGT9jcoSnrfUnRCqnMoF9XEeoWjbzObpqF9dRhHQj0Xb9QdF6/w==",
-      "dev": true,
-      "requires": {}
+      "dev": true
     },
     "jest-regex-util": {
       "version": "29.0.0",
diff --git a/src/factorial.js b/src/factorial.js
index 4f3ae70..e317159 100644
--- a/src/factorial.js
+++ b/src/factorial.js
@@ -1,5 +1,11 @@
 const factorial = (number) => {
   // your code here
+  if (number === 0 || number === 1) return 1
+  let res = 1
+  for (let i = 1; i <= number; i++) {
+    res *= i
+  }
+  return res
 }
 
 module.exports = factorial;
\ No newline at end of file
diff --git a/src/fibonacci.js b/src/fibonacci.js
index ea3270f..ca2b51b 100644
--- a/src/fibonacci.js
+++ b/src/fibonacci.js
@@ -1,5 +1,10 @@
 const fibonacci = (n) => {
   // your code here
+  let res = [0, 1]
+  for (let i = 2; i <= n; i++) {
+    res[i] = res[i - 2] + res[i - 1]
+  }
+  return res.slice(1)
 }
 
 module.exports = fibonacci;
\ No newline at end of file
diff --git a/src/primalidad.js b/src/primalidad.js
index 8bdb849..41e24d3 100644
--- a/src/primalidad.js
+++ b/src/primalidad.js
@@ -1,5 +1,14 @@
 const trialDivision = (number) => {
   // your code here
+  if (Number.isInteger(number)) {
+    if (number <= 0 || number <= 1) return false
+    for (var i = 2; i <= Math.sqrt(number); i++) {
+      if (number % i == 0) return false
+    }
+    return true
+  } else {
+    return false
+  }
 }
 
 module.exports = trialDivision;
\ No newline at end of file