We know PPS "regular" is getting closer to the megaprime region. When it arrives there, something has to happen because it "collides" with a block of numbers we already tested earlier. What will be done is not entirely clear yet. But they could decide to make a DIV-ish subproject again. Characteristic for DIV is to include only small k because small k mean big chances to find a divisor of a Fermat number (2^(2^m) + 1).