diff --git a/app/views/graders/submission.html.haml b/app/views/graders/submission.html.haml
--- a/app/views/graders/submission.html.haml
+++ b/app/views/graders/submission.html.haml
@@ -21,9 +21,9 @@
   %br/
   = "Comment: #{@submission.grader_comment}"
   %br/
-  = "Runtime (ms): #{@submission.max_runtime}"
+  = "Runtime (s): #{@submission.max_runtime}"
   %br/
-  = "Memory (kb): #{@submission.peak_memory}"
+  = "Memory (kb): #{number_with_delimiter(@submission.peak_memory)}"
 
 %b Source code (first 10kb)
 //%div.highlight{:style => "border: 1px solid black;"}
diff --git a/app/views/report/_task_hof.html.haml b/app/views/report/_task_hof.html.haml
--- a/app/views/report/_task_hof.html.haml
+++ b/app/views/report/_task_hof.html.haml
@@ -63,7 +63,7 @@
             = "#{link_to("#" + value[:runtime][:sub_id].to_s, controller: 'graders' , action: 'submission', id: value[:runtime][:sub_id])} )".html_safe
           %td
             = link_to value[:memory][:user], controller: 'users', action: 'profile', id: value[:memory][:user_id]
-            = "(#{value[:memory][:value]} @"
+            = "(#{number_with_delimiter(value[:memory][:value])} @"
             = "#{link_to("#" + value[:memory][:sub_id].to_s, controller: 'graders' , action: 'submission', id: value[:memory][:sub_id])} )".html_safe
           %td
             = link_to value[:length][:user], controller: 'users', action: 'profile', id: value[:length][:user_id]