Constant curve25519_dalek::constants::BASEPOINT_ORDER

pub const BASEPOINT_ORDER: Scalar = Scalar{bytes:
           [237, 211, 245, 92, 26, 99, 18, 88, 214, 156, 247, 162, 222, 249,
            222, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16],}

BASEPOINT_ORDER is the order of the Ristretto group and of the Ed25519 basepoint, i.e., $$ \ell = 2^{252} + 27742317777372353535851937790883648493. $$