What is the relation between these private keys?
573619
0.0573619
1505297...
0x15cf751db (I saw this in your second screenshot, not sure what this is I'm assuming a hex version of a privkey)?


Well, I can understand that we are multiplying public keys A and B to get C, but what's special about the relation between their private keys (private key A and C in particular, why use a large number to get 573619?)

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What I'm saying is, if you decrypt the private key
We are talking about a lot of private keys with decimal points.