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Old 2007-01-10, 15:08   #3
robert44444uk's Avatar
Jun 2003
Oxford, UK

36108 Posts

The alternative Sierpinski/ Riesel works off b^n+/-k. Numbers of this form have the same properties as k*b^n+/-1. (trust me, this is the case!!) It is not so popular because you cannot prove the numbers prime, only prp.

But there is a whole community of people out there interested in finding just that... numbers that are prp but not prime.


Henri lists the top 10000 prps and therefore it is easy to get into this list.

But first you need to work out the probable Sierpinski/ Riesels for b^n+/-k, and then look at eliminating all k up to the chosen value. In this way you will find prps of some other k value such as L in b^n+/-L which Henri will be pleased to list
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