diff --git a/e_97.py b/e_97.py
index 9c30bb1..c4b75ca 100644
--- a/e_97.py
+++ b/e_97.py
@@ -4,7 +4,7 @@ Created on 10 feb. 2012
 
 @author: Julien Lengrand-Lambert
 
-DESCRIPTION: Solves problem 31 of Project Euler
+DESCRIPTION: Solves problem 97 of Project Euler
 The first known prime found to exceed one million digits was discovered in 1999, and is a Mersenne prime of the form 2^6972593 - 1.
 it contains exactly 2,098,960 digits. Subsequently other Mersenne primes, of the form 2^p - 1, have been found which contain more digits.