Curve from https://github.com/relic-toolkit/relic

Parameters

SAGE

p = 0x1ffffffffffffffffffffffffffffffffffffffffffffffffffffffd
K = GF(p)
a = K(0x155555555555555555555555555555555555555555555552174084FF)
b = K(0x1425ED097B425ED097B425ED097B425ED097B425ED0BBA9428427967)
E = EllipticCurve(K, (a, b))
G = E(0xCB476FE081B61F56A60B1D1B34FB7207D072EF25DADF377731049B0, 0x36429404D97E1E217BAD2E5601F6551F95D8FE9481BD454D1F3E7B6)
E.set_order(0x3FFFFFFFFFFFFFFFFFFFFFFFFFFF5CD04695A145C3067CF4AAE2025 * 0x08)

PARI/GP

p = 0x1ffffffffffffffffffffffffffffffffffffffffffffffffffffffd
a = Mod(0x155555555555555555555555555555555555555555555552174084FF, p)
b = Mod(0x1425ED097B425ED097B425ED097B425ED097B425ED0BBA9428427967, p)
E = ellinit([a, b])
E[16][1] = 0x3FFFFFFFFFFFFFFFFFFFFFFFFFFF5CD04695A145C3067CF4AAE2025 * 0x08
G = [Mod(0xCB476FE081B61F56A60B1D1B34FB7207D072EF25DADF377731049B0, p), Mod(0x36429404D97E1E217BAD2E5601F6551F95D8FE9481BD454D1F3E7B6, p)]

JSON

{
  "name": "Curve22103",
  "desc": "Curve from https://github.com/relic-toolkit/relic",
  "form": "Weierstrass",
  "field": {
    "type": "Prime",
    "p": "0x1ffffffffffffffffffffffffffffffffffffffffffffffffffffffd",
    "bits": 221
  },
  "params": {
    "a": {
      "raw": "0x155555555555555555555555555555555555555555555552174084FF"
    },
    "b": {
      "raw": "0x1425ED097B425ED097B425ED097B425ED097B425ED0BBA9428427967"
    }
  },
  "generator": {
    "x": {
      "raw": "0xCB476FE081B61F56A60B1D1B34FB7207D072EF25DADF377731049B0"
    },
    "y": {
      "raw": "0x36429404D97E1E217BAD2E5601F6551F95D8FE9481BD454D1F3E7B6"
    }
  },
  "order": "0x3FFFFFFFFFFFFFFFFFFFFFFFFFFF5CD04695A145C3067CF4AAE2025",
  "cofactor": "0x08"
}