At 300 MKeys/s?
I check around 5.316911983139664e+36//1000000000000000 in moment (for 2**0...2**256).
but this is not for cracking secp256k1, or puzzle 135, or all elliptic curves.
so I generally keep quiet. this is only for education and testing purposes.
hmm. weird stuff with math in y**2=x**3+7 arrived.