- ----This uses a state-of-the-art cache-friendly Sieve of Eratosthenes
to enumerate the primes up to some fixed bound (in a memory
efficient manner), and then allows this cached information to be
used for things like enumerating and counting primes.
`primal` takes around 2.8 seconds and less than 3MB of RAM to
count the exact number of primes below 10<sup>10</sup> (455052511)
on the author's laptop (i7-3517U).
[**Documentation**](http://docs.rs/primal/)
[](https://crates.io/crates/primal)
[](https://docs.rs/primal)

`primal` puts raw power into prime numbers.
This crates includes