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+import PIL, math
+
+#Problem 14 Longest Collatz sequence
+#Note, a little slow, takes about 15 seconds. 
+#There is probably a more efficient solution out there
+chain = []
+biggo = []
+
+def collatz(seed):
+	chain.append(seed)
+	if(seed == 1): return 0
+	if(seed%2 == 0):
+		seed = seed/2
+	else:
+		seed = 3*seed +1
+	collatz(seed)
+
+for n in range(1,pow(10,6)):
+	collatz(n)
+	if(len(chain)>len(biggo)):
+		biggo = chain
+	chain = []
+print(biggo)
+print("Has " + str(len(biggo)) +" numbers.")