BADA55 curve from the https://bada55.cr.yp.to/bada55-20150927.pdf

Parameters

SAGE

p = 0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c03
K = GF(p)
a = K(0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c00)
b = K(0xbada55bada55bada55bada55bada55bada55bada55bada55bada55bada55bd48)
E = EllipticCurve(K, (a, b))
# No generator defined
E.set_order(0xf1fd178c0b3ad58f10126de8ce42435a1a8e3837861aa0efa0e52aec7379c967 * 0x01)

PARI/GP

p = 0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c03
a = Mod(0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c00, p)
b = Mod(0xbada55bada55bada55bada55bada55bada55bada55bada55bada55bada55bd48, p)
E = ellinit([a, b])
E[16][1] = 0xf1fd178c0b3ad58f10126de8ce42435a1a8e3837861aa0efa0e52aec7379c967 * 0x01
\\ No generator defined

JSON

{
  "name": "BADA55-R-256",
  "desc": "BADA55 curve from the https://bada55.cr.yp.to/bada55-20150927.pdf",
  "form": "Weierstrass",
  "field": {
    "type": "Prime",
    "p": "0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c03",
    "bits": 256
  },
  "params": {
    "a": {
      "raw": "0xf1fd178c0b3ad58f10126de8ce42435b3961adbcabc8ca6de8fcf353d86e9c00"
    },
    "b": {
      "raw": "0xbada55bada55bada55bada55bada55bada55bada55bada55bada55bada55bd48"
    }
  },
  "order": "0xf1fd178c0b3ad58f10126de8ce42435a1a8e3837861aa0efa0e52aec7379c967",
  "cofactor": "0x01"
}