What is the asymptotic order of numbers divisible by no primes except those of the form $an+b$ ($a$, $b$ fixed)?
Surely (except for the trivial cases) they are of order strictly between that of he primes and of all numbers.
What is the asymptotic order of numbers divisible by no primes except those of the form $an+b$ ($a$, $b$ fixed)?
Surely (except for the trivial cases) they are of order strictly between that of he primes and of all numbers.