diff --git a/.gitignore b/.gitignore
index 3afe388..be81ff5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -129,4 +129,7 @@ dmypy.json
 .pyre/
 
 # Vs Code
-.vscode/
\ No newline at end of file
+.vscode/
+
+# IntelliJ
+.idea
\ No newline at end of file
diff --git a/cracker.py b/cracker.py
index 0c1cf4e..bccdb83 100644
--- a/cracker.py
+++ b/cracker.py
@@ -39,7 +39,7 @@ def main():
     print("q = %d" % q)
     print("Factorizing complete.")
 
-    phi = (p - 1) * (q - 1)
+    phi = (p - 1) * (q - 1) if p != q else p * p - p
 
     print("phi(n) = %d" % phi)