diff --git a/project1.py b/project1.py
index e66b77e..a5f21be 100644
--- a/project1.py
+++ b/project1.py
@@ -4,9 +4,18 @@ def fib(number_for_fibonacci):
 
 
 def is_prime(number_to_check):
-    # Add code here
-    # comment added by new user
-    return #boolean value
+prime="True"
+flag=1
+for word in range((int(number_to_check))//2-2) :
+     if int(number_to_check)%int(word+2)==0 :
+         flag=0
+         break
+if number_to_check=="1":
+    print(~prime)
+elif flag==1:
+     print( prime)
+else :
+      print(~prime)
 
 
 def reverse_string(string_to_be_reversed):