Issue #2138: Add math.factorial().
diff --git a/Misc/NEWS b/Misc/NEWS
index b5afbcc..4337e5d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -40,6 +40,8 @@
 Extension Modules
 -----------------
 
+- Issue #2138: Add factorial() the math module.
+
 - The heapq module does comparisons using LT instead of LE.  This
   makes its implementation match that used by list.sort().