In WA state it's 3...5 would make it even more likely people will apply for the minimum so they don't run out of real jobs to apply and claim for each week. The system subsidizes a prolonged search.
It is probably nearly impossible to check on the validity of claimed applications. I know I've always reported the truth on where I've applied when I was on unemployment...obviously not everyone has the same tie to honesty.
I was on unemployment 3 to 4 years ago, and every 2 weeks you received the form with 10 SLOTS. I completely filled out 10, and have the e-mails to prove it, just in case. My objective back then, was to make contact at least 5 a day as a sense of accomplishment for the day.