Editing Prime numbers (section)

=== Conclusions ===
All these variants being variations of trial division, finding out primes by direct divisibility testing of every candidate number by sequential primes below its square root (instead of just by ''its factors'', which is what ''direct generation of multiples'' is doing, essentially), are thus principally of worse complexity than that of Sieve of Eratosthenes.

The initial code is just a one-liner that ought to have been regarded as ''executable specification'' in the first place. It can easily be improved quite significantly with a simple use of bounded, guarded formulation to limit the number of filters it creates, or by postponement of filter creation.