diff --git a/src/factorial.js b/src/factorial.js
index 4f3ae70..ecaf8c4 100644
--- a/src/factorial.js
+++ b/src/factorial.js
@@ -1,5 +1,7 @@
 const factorial = (number) => {
   // your code here
+  var fac=1;
+ for(var i=1;i<=number;i++){fac=fac*i; }return fac;
 }
 
 module.exports = factorial;
\ No newline at end of file
diff --git a/src/fibonacci.js b/src/fibonacci.js
index ea3270f..05f2d8e 100644
--- a/src/fibonacci.js
+++ b/src/fibonacci.js
@@ -1,5 +1,15 @@
 const fibonacci = (n) => {
   // your code here
+  var fibo = [];
+  var a=0;
+  var b=1;
+for (var i = 0; i < n; i++) {
+  var aux=a;
+  a=b;
+  b=aux+b;
+  fibo.push(a);
+}
+return fibo;
 }
 
 module.exports = fibonacci;
\ No newline at end of file
diff --git a/src/primalidad.js b/src/primalidad.js
index 8bdb849..5ce38b6 100644
--- a/src/primalidad.js
+++ b/src/primalidad.js
@@ -1,5 +1,14 @@
 const trialDivision = (number) => {
   // your code here
+ function isFloat(number){
+  return Number(number) === number && number % 1 !== 0;
+}
+ if (number == 0 || number == 1 || number == 4||number <= 1||isFloat(number)) return false;
+ for (let x = 2; x < number / 2; x++) {
+   if (number % x == 0) return false;
+ }
+ return true;
+ 
 }
 
 module.exports = trialDivision;
\ No newline at end of file