Yes, I believe they incorporated the layman definition (of random) to describe the existence of a pattern of prime number expression - a random pattern - in particular prime number (ending) in one, back to back. A previously unknown & or unexpected bias (or tendency towards ?) with (or in) the distribution of…

Mathematical investigation does not have only one definition for random which incidentally was not specified (however obvious the usage at this particular instance may only be deemed)

Quite true

U did