extern crate aks_test_for_primes; use std::iter::Filter; use std::ops::RangeFrom; use aks_test_for_primes::is_prime; fn main() { for i in pernicious().take(25) { print!("{} ", i); } println!(); for i in (888_888_877u64..888_888_888).filter(is_pernicious) { print!("{} ", i); } } fn pernicious() -> Filter, fn(&u64) -> bool> { (0u64..).filter(is_pernicious as fn(&u64) -> bool) } fn is_pernicious(n: &u64) -> bool { is_prime(n.count_ones()) }