A few hours after writing my last post, I was reading the new issue of Scientific American. By an amzing coincidence, they had an article on the spacing of prime numbers. This said that the ratio of 1:6 (2x3) only holds for the first few hundred primes. It then drops to 1:30 (2x3x5) and later to 1:210 (2x3x5x7) and so on. So primes do become rarer.
Yeah, not only do the primes become rarer, but their “density” goes to zero the farther you go out. See my earlier post a ways up the page.
I finally found a definition of semiprime numbers: A semiprime (also called a 2-almost prime) is an integer that is the product of exactly two primes (possibly the same).
So it looks like everyone was right. :D:D
I got this from Jim Loy’s Mathematics Page.
Yeah, a simi-prime is one without opposable thumbs.