diff --git a/2015/4/part1.py b/2015/4/part1.py
new file mode 100644
index 0000000..59ed54e
--- /dev/null
+++ b/2015/4/part1.py
@@ -0,0 +1,14 @@
+input = "ckczppom"
+
+import hashlib
+num = 6
+i = 0
+while True:
+	i += 1
+	m = hashlib.md5()
+	m.update(str(input+str(i)).encode())
+	print(m.hexdigest())
+	if m.hexdigest()[0:num] == "0"*num:
+		print(i)
+		break
+
diff --git a/README.md b/README.md
index 7c9c562..b8b68d0 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ It's a fun challenge from [here](https://adventofcode.com).
     * [1](https://adventofcode.com/2015/day/1) * *
     * [2](https://adventofcode.com/2015/day/2) * *
     * [3](https://adventofcode.com/2015/day/3) * *
-    * [4](https://adventofcode.com/2015/day/4)
+    * [4](https://adventofcode.com/2015/day/4) * *
 * [2016](https://adventofcode.com/2016)
 * [2017](https://adventofcode.com/2017)
 * [2018](https://adventofcode.com/2018)