That is how many shares are available to short through interactivebrokers. At the end of the day Friday, they were charging 71% fee and were out of shares available to short. Normally that is when the brokers start emailing longs offering them money to allow their shares to be borrowed to allow more shorting. And Adam F. tweets about leronlimab after, possibly connected. Monday will be very interesting. Short interest 4/15 was 8M shares. That is $24M short, which is enormous for an otc stock imo, I normally see very little short interest in otc.