But doesn't "subprime" sound like it should be a mathematical term? It seems like it would either mean:
- numbers which are just less than a prime (let's say numbers of the form p-1, where p is a prime)
- numbers which are "almost prime" (say, products of two primes)
But what would a "superprime" be? In the first case, the analogous definition is clearly numbers of the form p+1; in the second case, the only extension I can think of is numbers which are products of 0 primes, i. e. the number 1.