% openssl ecparam -name secp256k1 > ecparam

% cat ecparam
-----BEGIN EC PARAMETERS-----
BgUrgQQACg==
-----END EC PARAMETERS-----

% openssl asn1parse < ecparam
    0:d=0  hl=2 l=   5 prim: OBJECT            :secp256k1

% openssl req -new -newkey ec:ecparam -keyout Bob.pem -out newreq.pem
Generating a 256 bit EC private key
writing new private key to 'Bob.pem'
Enter PEM pass phrase: Bobby
Verifying - Enter PEM pass phrase: Bobby
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [US]:
State or Province Name (full name) [Pennsylvania]:
Locality Name (eg, city) [Villanova]:
Organization Name (eg, company) [RP Consulting]:Bob
Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:Bob
Email Address []:Bob

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
%