diff --git a/README.md b/README.md
index 5d045f3..a989c99 100644
--- a/README.md
+++ b/README.md
@@ -120,6 +120,9 @@ respectively.
 compute a very large number of digits and therefore doesn't come with a
 verified, fixed, approximation of γ.
 
+`ex-2/digits` containes compressed text files of the first 1M digits
+of γ, obtained from `ex-2/bin/fast` and from `sympy` (using `mpmath`).
+
 
 ### Exercise 3