ASN1 OID: secp521r1
NIST CURVE: P-521
-----BEGIN EC PARAMETERS-----
BgUrgQQAIw==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MIHcAgEBBEIATKTYZCjZQA57LfORLrmWwZWJUEOvkuht5wrk30byKikaa7J0iq6C
WA32w59Js+2C8XiezhtlfUVDjP8VZTQ1RXWgBwYFK4EEACOhgYkDgYYABAH40KfD
xY2EGVeWnyE6lPPaVQ7fdtjdFxUx81uwaci8MA1vazfRgEapcX8sb1lRnIJwlbKa
YxMwYhjCNXaUAND5bQAKGTujRmUr60CamkXFl6Ptky3Vqq6Wvy8xflp6x0WLPGzb
qpDDVTgs383Kc3fZLrIKXox0I3ylo0Wxnj8aIpCxVA==
-----END EC PRIVATE KEY-----