diff --git a/README.md b/README.md
index 00e8801..2de2e70 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # Indivisible
 
-Indivisible is an optimized prime number generator and tester.
+Indivisible is an optimized prime number generator and tester using a segmented
+version of the [Sieve of
+Eratosthenes](https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes).
 
 ## Build & Installation