diff --git a/problem3.py b/problem3.py
new file mode 100644
index 0000000..1bb0605
--- /dev/null
+++ b/problem3.py
@@ -0,0 +1,15 @@
+import math
+
+n = 600851475143
+
+def pf(n):
+    factors = []
+    for i in range(2, n):
+        if n / i == n // i:
+            n //= i
+            factors.append(i)
+        if n == 1:
+            break
+    return factors
+
+print(pf(n))