Nothing magic about even or power of two core counts. https://en.wikichip.org/wiki/chip_multiprocessor https://en.wikichip.org/wiki/chip_multiprocessor Lots o

Nothing magic about even or power of two core counts. https://en.wikichip.org/wiki/chip_multiprocessor https://en.wikichip.org/wiki/chip_multiprocessor Lots of "odd" counts by your two criteria (though not many odd counts).