[robert44444uk]

I rather like the fact that projects get started, die down, and then a new person or group of people take it up again.

There is theoretical interest in this particular topic, enough to generate two papers, yet to be published. There is not a lot more to say about Sierpinski base 2 (other than proving the particular k value is the lowest Sierpinski). There are really interesting aspects to looking at other bases, and these have led to some interesting discussions on what a Sierpinski number really is. (what should you include or exclude in the definition, quite vexing and perplexing).

I can't think what is wrong with picking low fruit, it is often quite tasty.