Tom-384 curve from https://eprint.iacr.org/2021/1183.pdf

Parameters

SAGE

p = 0xfffffffffffffffffffffffffffffffffffffffffffffffeaf5f689f8669fb41b08d5f5edffd26599c434bbd978917c5
K = GF(p)
a = K(0x821dfdc940e7f074ac481f8b2870c48962cce56abd72dfc42813a944cea15df78dc0a2d97fbf031ed26c9076826940ba)
b = K(0x9b5b584b655fdcb087d37f8c4fee893c0499223db5e004c674ea0dee48a4ec0c9e9f684099f2a51c62a2cce400cb1e4b)
E = EllipticCurve(K, (a, b))
# No generator defined
E.set_order(0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffeffffffff0000000000000000ffffffff * 0x01)

PARI/GP

p = 0xfffffffffffffffffffffffffffffffffffffffffffffffeaf5f689f8669fb41b08d5f5edffd26599c434bbd978917c5
a = Mod(0x821dfdc940e7f074ac481f8b2870c48962cce56abd72dfc42813a944cea15df78dc0a2d97fbf031ed26c9076826940ba, p)
b = Mod(0x9b5b584b655fdcb087d37f8c4fee893c0499223db5e004c674ea0dee48a4ec0c9e9f684099f2a51c62a2cce400cb1e4b, p)
E = ellinit([a, b])
E[16][1] = 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffeffffffff0000000000000000ffffffff * 0x01
\\ No generator defined

JSON

{
  "name": "Tom-384",
  "desc": "Tom-384 curve from https://eprint.iacr.org/2021/1183.pdf",
  "form": "Weierstrass",
  "field": {
    "type": "Prime",
    "p": "0xfffffffffffffffffffffffffffffffffffffffffffffffeaf5f689f8669fb41b08d5f5edffd26599c434bbd978917c5",
    "bits": 384
  },
  "params": {
    "a": {
      "raw": "0x821dfdc940e7f074ac481f8b2870c48962cce56abd72dfc42813a944cea15df78dc0a2d97fbf031ed26c9076826940ba"
    },
    "b": {
      "raw": "0x9b5b584b655fdcb087d37f8c4fee893c0499223db5e004c674ea0dee48a4ec0c9e9f684099f2a51c62a2cce400cb1e4b"
    }
  },
  "order": "0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffeffffffff0000000000000000ffffffff",
  "cofactor": "0x01"
}