Static Y1_ZEROS_VALUES 

pub(crate) static Y1_ZEROS_VALUES: [u64; 33]

Value at zero or extremum of Y1 belongs to Y1_ZEROS Generated by MPFR:

let mut arr = vec![];
for zeros in Y1_ZEROS.iter() {
    if zeros.1 == 0 {
        arr.push(0);
    } else {
        let mpfr = Float::with_val(107, f64::from_bits(zeros.1)).y1();
        arr.push(mpfr.to_f64().to_bits());
    }
}
println!(
    "arr: [{}]",
    arr.iter()
        .map(|x| format!("0x{:016x}", x))
        .collect::<Vec<_>>()
        .join(", ")
);