B/M Prime is a star system owned and operated by Bokamba/Mercer. Named according to Interstellar Prospecting Laws it probably designates the 1st star system discovered and colonised by B/M. April discovers that Warren Hughes' little sister Erika Hughes was adopted by one Lt. Carol Drake, employee of B/M and resident of B/M Prime. When April relays this information to Warren he intimates that he has to find his sister, which would presumably entail travel to B/M Prime.