libs.rs

pub fn prime(amount: i32) -> Vec<i64> {
    let amount: usize = amount as usize;
    let mut out: Vec<usize> = (0..amount)
        .map(|n| {
            if n % 2 == 1 && n % 5 != 0 && n % 3 != 0 && n % 7 != 0 {
                n
            } else {
                0
            }
        })
        .collect::<Vec<usize>>();
    for x in 2..amount {
        if out[x] == 0 {
            continue;
        }
        for i in (x * x..amount).step_by(x) {
            {
                out[i] = 0;
            }
        }
    }
    return out
        .into_iter()
        .filter(|n| *n != 0)
        .map(|n| n as i64)
        .collect::<Vec<i64>>();
}