Counting with composites..... Please advise What is the standard for counting with composite numbers? If I can count to infinity with all odd composites and factor them, would that be considered key to counting all primes to infinity. By default all missing odd numbers in the sequence would be Prime. Having difficulty finding the precedent for this. My composite number line is growing to infinity without missing a composite, so at what point can we say all primes are the numbers that fall between, which leaves us with all primes to infinity? Please Advise.