diff --git a/content/prime/prime-intro.rst b/content/prime/prime-intro.rst
index 0dffe0f..b0a6f22 100644
--- a/content/prime/prime-intro.rst
+++ b/content/prime/prime-intro.rst
@@ -6,6 +6,7 @@ Introduction to Prime Numbers
 :tags: prime, primenumbers
 :category: prime
 :slug: prime1
+:summary: A prime is a positive integer *p* having exactly two positive divisors, namely *1* and *p*. An integer *n* is composite if *n* > *1* and *n* is not prime. (The number 1 is considered neither prime nor composite.)
 
 .. epigraph::