Curve from https://eprint.iacr.org/2014/130.pdf. No generator present.

Parameters

SAGE

p = 0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
K = GF(p)
a = K(0x3eddfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffc)
b = K(0x988d)
E = EllipticCurve(K, (a, b))
# No generator defined
E.set_order(0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb9146ccde150ef33747ab29d1e6573d8d22de95e322303f3a00b200986fa9a2d * 0x01)

PARI/GP

p = 0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
a = Mod(0x3eddfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffc, p)
b = Mod(0x988d, p)
E = ellinit([a, b])
E[16][1] = 0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb9146ccde150ef33747ab29d1e6573d8d22de95e322303f3a00b200986fa9a2d * 0x01
\\ No generator defined

JSON

{
  "name": "w-510-mont",
  "desc": "Curve from https://eprint.iacr.org/2014/130.pdf. No generator present.",
  "form": "Weierstrass",
  "field": {
    "type": "Prime",
    "p": "0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
    "bits": 510
  },
  "params": {
    "a": {
      "raw": "0x3eddfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffc"
    },
    "b": {
      "raw": "0x988d"
    }
  },
  "order": "0x3eddffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb9146ccde150ef33747ab29d1e6573d8d22de95e322303f3a00b200986fa9a2d",
  "cofactor": "0x01"
}