merged

--- a/src/HOL/Number_Theory/Primes.thy	Wed Nov 05 22:37:14 2014 +0100
+++ b/src/HOL/Number_Theory/Primes.thy	Wed Nov 05 22:39:49 2014 +0100
@@ -154,7 +154,7 @@
 
 text{* A bit of regression testing: *}
 
-lemma "prime(97::nat)" by simp
+lemma "prime(7::nat)" by simp
 lemma "prime(997::nat)" by eval