Start a faster Lucas (doesn't work)

lucas.py

@@ -119,5 +119,17 @@ def LucasVn(n, p, q):
     return Lucas(n, p, q)[1]
 
 
+def LucasFast(k, p, q, n):
+    if k < 0:
+        raise ValueError("k must be a non-negative integer")
+    if n < 1:
+        raise ValueError("n must be a postive integer")
+    uc, vc = Lucas(1, p, q)
+    dk = floor(log(k, 2))
+    tp = 2**dk
+    for i in range(dk):
+
+
+