Well of course it is, the primacy effect = remember the first digit of a sample ..the recency = remember the last digit of a sample. So, to answer this question you need to understand the broadband filter model of selective attention, which states that sensory information first goes into the the sensory buffer and then short-term memory and so on. Consequently, the recency effect is primarly due to the fact that information is still in the sensory buffer thus has yet to be eliminated. And sensory information stay in the sensory buffer for at most 20 sec, whereas the primacy effect is due to the fact that the information has had the most time to encoded into Long term memory storage.
so in short, primacy effect = information goes through the sensory buffer since it had the most time to be encoded, Recency effect = information doesnt necessary goes through the sensory buffer, but enter it last. Thus still can be processed in some way..