diff --git a/README.md b/README.md
index 5606bf6..509e0f4 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,4 @@ $ cabal test
 + Fermat's factorization
 + Pollard's p-1
 + Dixon
++ GNFS (General Number Field Sieve)