libs.rs

pub fn prime(amount: i32) -> Vec<i64> {
    let mut out: Vec<i64> = Vec::with_capacity(amount as usize / 3);
    let mut allowed: Vec<bool> = vec![false; amount as usize];
    for i in
        (0_usize..amount as usize).filter(|n| n % 2 == 1 && n % 5 != 0 && n % 3 != 0 && n % 7 != 0)
    {
        allowed[i] = true;
    }
    out.push(2_i64);
    out.push(3_i64);
    out.push(5_i64);
    out.push(7_i64);
    for i in (4..amount as usize).filter(|n| n % 2 == 1 && n % 5 != 0 && n % 3 != 0 && n % 7 != 0) {
        let mut div = false;
        for x in (2..((i / 3) + 1)).filter(|n| allowed[*n]) {
            if (i as f64 % x as f64) == 0.0 {
                div = true;
            }
        }
        if div == false {
            out.push(i as i64);
        }
        //print!("\r{}% done", ((i as f32 / amount as f32) * 100.0) as i32);
    }
    return out;
}