how many potatoes do i need to make

i need to make 2 13x9 pans of potato salad for this potluck barbecue i'm going to and all google search results are SEO AI garbage that don't ANSWER my FRICKING QUESTION :marseyrage: . please just tell me how many pounds of potatoes i should use. i haven't made potato salad for like 10 years because i'm anapilled

also give me good recipes. i'm thinking about doing one pan of curried potato salad and one pan of regular potato salad for :marseychonker2: !bumpkins who think turmeric is too spicy