title: What is maximum size/limitation of ListProperty for Google App Engine datastore?
body: <p>I am using GAE long time but can not find what is maximum length of ListProperty.</p>
  
  <p>I was read <a href="https://developers.google.com/appengine/docs/python/datastore/typesandpropertyclasses#ListProperty" rel="noreferrer">documentation</a> but not found solution I want to create ListProperty(long) to keep about 30 values of long or more. I want use this field as filter - can I use it similar to StringListProperty?</p>
  
  <p>What is size limits of ListProperty(long)?</p>