I have found a few interesting hints regarding the puzzle 130, since I don't know the actual private key, I will just leave them here for the author to verify.
Are the following values related to the puzzle 130 in any way? Like being the last characters, first characters, the key being divisible by them etc?
3c8
f2
ec
If yes then I might be onto something. Then I'd need a hint to follow up on it, you might also want to check the inverse key as well.
I think that if the creator was to come here and give us hints, this would defeat the purpose of his creation which is to measure our cracking capabilities.
Can't really be giving out hints in an experiment like this one, we must check our own leads and see what comes out of it.