diff --git a/prime or composite.py b/prime or composite.py
new file mode 100644
index 0000000..fb65d47
--- /dev/null
+++ b/prime or composite.py	
@@ -0,0 +1,72 @@
+print('Bakhsh Paziri')
+
+wrong = True
+
+
+def write_children():
+    wrong = False
+    n = input('write your number(from 2 to 50000): ')
+    try:
+        n = int(n)
+        if n < 2 or n > 50000:
+            wrong = True
+            print('adade vaared shode khaarej az renge tarif shode ast!')
+        else:
+            n = int(n)
+            m = int(n/2)
+
+            def is_prime(n):
+                avval = True
+                for i in range(2, n):
+                    if n % i == 0:
+                        avval = False
+                        break
+                return avval
+            t = []
+            for i in range(2, m+1):
+                if is_prime(i):
+                    t.append(i)
+
+            def bakhshpaziri(n, t):
+                l = []
+                for i in t:
+                    if n % i == 0:
+                        l.append(i)
+                return l
+            l = bakhshpaziri(n, t)
+            if len(l) != 0:
+                s = 'bar adaade avale '
+                c = 0
+                for i in l:
+                    s += str(i)
+                    if c < len(l)-1:
+                        s += ', '
+                    c += 1
+                print(s, 'bakhsh pazir ast.')
+            else:
+                print(n, 'yek adade aval ast.')
+
+            edame = input(
+                'do you want continue?(please write "yes(y)" or "no(n)"): ')
+            akbar = True
+            while akbar:
+                if edame == 'yes' or edame == 'y':
+                    wrong = True
+                    break
+                if edame == 'no' or edame == 'n':
+                    print('Finish!')
+                    print('Programmed by M_ZRK')
+                    break
+                else:
+                    print('your answer is not valid!')
+                    edame = input(
+                        'do you want continue?(please write "yes" or "no"): ')
+
+    except ValueError:
+        print('wrong input!')
+        wrong = True
+    return wrong
+
+
+while wrong:
+    wrong = write_children()