Output number of threads in use

burn.py

@@ -52,7 +52,7 @@ def burn(hours, threads):
     c = 10**(1 - 36*log10(1.618))
     n = log10(hours*3600/c)/log10(1.618)
     n = int(floor(n))
-    print("Burning {} hours by stupidly calculating fib({}).".format(hours, n))
+    print("Burning {} hours by stupidly calculating fib({}), using {} thread(s)".format(hours, n, threads))
     with ProcessPoolExecutor(max_workers=threads) as pool:
         futures = {pool.submit(fib, n) for i in range(threads)}
         for index, future in enumerate(as_completed(futures)):