diff --git a/ProjectObsidian/ProtoFlux/Math/Factorial.cs b/ProjectObsidian/ProtoFlux/Math/Factorial.cs
deleted file mode 100644
index 158cc8d..0000000
--- a/ProjectObsidian/ProtoFlux/Math/Factorial.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-using System;
-using Elements.Core;
-using ProtoFlux.Core;
-using ProtoFlux.Runtimes.Execution;
-using FrooxEngine.ProtoFlux;
-
-namespace ProtoFlux.Runtimes.Execution.Nodes.Obsidian.Math
-{
-    [NodeCategory("Obsidian/Math")]
-    [NodeName("Factorial")]
-    public class FactorialNode : ValueFunctionNode<FrooxEngineContext, int>
-    {
-        public ValueInput<int> Input;
-
-        protected override int Compute(FrooxEngineContext context)
-        {
-            var input = Input.Evaluate(context);
-            var fact = 1;
-            var loop = MathX.Clamp(input, 0, 16);
-            for (var i = 1; i <= loop; i++) fact *= i;
-            return fact;
-        }
-    }
-}