filter query by numbers of user reviews

hi, i ve been trying to figure out how to filter by above certain amount of user reviews and came up with http://www.giantbomb.com/api/games/?api_key=[MY_API_KEY]&limit=100&format=json&field_list=name,id,original_release_date,number_of_user_reviews&filter=number_of_user_reviews:50|1000

but it doesnt work like with date, so can anyone give me a hand with i would apreciate it

btw in my original link theres a sort added "sort=number_of_user_reviews:desc" it doest work but i want to filter that quantity of number of total results