openssl/apps/dh512.pem

-----BEGIN DH PARAMETERS-----
MEYCQQD1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6ypUM2Zafq9AKUJsCRtMIPWak
XUGfnHy9iUsiGSa6q6Jew1XpKgVfAgEC
-----END DH PARAMETERS-----

These are the 512 bit DH parameters from "Assigned Number for SKIP Protocols"
(http://www.skip-vpn.org/spec/numbers.html).
See there for how they were generated.
Note that g is not a generator, but this is not a problem since p is a safe prime.