diff --git a/Day01-15/code/Day05/perfect_new.py b/Day01-15/code/Day05/perfect_new.py
new file mode 100644
index 0000000..1300e89
--- /dev/null
+++ b/Day01-15/code/Day05/perfect_new.py
@@ -0,0 +1,20 @@
+"""
+找出1~9999之间的所有完美数
+完美数是除自身外其他所有因子的和正好等于这个数本身的数
+例如: 6 = 1 + 2 + 3, 28 = 1 + 2 + 4 + 7 + 14
+Differ: "1" 不是完美数
+Version: 0.2
+Author: Griffin Chen
+Date: 2021-6-23
+"""
+import math
+
+for num in range(2, 10000):
+    result = 0
+    for factor in range(1, int(math.sqrt(num)) + 1):
+        if num % factor == 0:
+            result += factor
+            if 1 < factor != num // factor:
+                result += num // factor
+    if result == num:
+        print(num)
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