diff --git a/README.md b/README.md
index 46b23b1d6..905a5e717 100644
--- a/README.md
+++ b/README.md
@@ -102,7 +102,6 @@ To do
 - ls-ls
 - ls-vdir
 - ls
-- make-prime-list
 - mkfifo
 - mknod
 - mktemp