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

Parameters

SAGE

p = 0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd03
K = GF(p)
a = K(0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd00)
b = K(-0x51bd)
E = EllipticCurve(K, (a, b))
# No generator defined
E.set_order(0x7fffffffffffffffffffffffffffffff864a38283ad2b3dfab8fac983c594aeb * 0x01)

PARI/GP

p = 0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd03
a = Mod(0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd00, p)
b = Mod(-0x51bd, p)
E = ellinit([a, b])
E[16][1] = 0x7fffffffffffffffffffffffffffffff864a38283ad2b3dfab8fac983c594aeb * 0x01
\\ No generator defined

JSON

{
  "name": "w-255-mers",
  "desc": "Curve from https://eprint.iacr.org/2014/130.pdf. No generator present.",
  "form": "Weierstrass",
  "field": {
    "type": "Prime",
    "p": "0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd03",
    "bits": 255
  },
  "params": {
    "a": {
      "raw": "0x7ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd00"
    },
    "b": {
      "raw": "-0x51bd"
    }
  },
  "order": "0x7fffffffffffffffffffffffffffffff864a38283ad2b3dfab8fac983c594aeb",
  "cofactor": "0x01"
}