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.