Quote from: kalos15btc on June 12, 2023, 11:32:58 PM

Quote from: digaran on June 12, 2023, 08:40:16 PM

Quote from: kalos15btc on June 12, 2023, 07:22:26 PM

This part of your post "19...................." is more important, but you are hiding it, so....
And I think pretty much addresses and private key ranges have no relation, it is useless to look for addresses when you do operations on public keys.

Besides, you have to tell us whether this key is -n or +n, but if you give me the key you subtracted from #125 which starts with 19, I could tell you the -n or +n of this key

02c0643bd28d11d650b24dae3143b1d3578e6a3597a9395f43c25ead8ed2a9298f

im sorry i just saw now -n and +n,, i thought you where saying -a , -s ...

what is +n and -n bro ?

Lol, weren't you teaching me how these things work a couple of hours ago? 😅 you tell me what it is, but here what I know and can share.

This is N =

Code:

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141

And this is my private key : +n

Code:

000000000000000000000000000000000000000083c88248824882488248f3cf

Now if we convert both keys above to decimal and subtract my +n private key from N, we will get this :

Code:

fffffffffffffffffffffffffffffffebaaedce62b801df33d89dc444ded4d72

My +n public key starts with 02 =

Code:

02787612ded11193e4bb5490c31d24c5a75bcec9fda0f794979556aec260990ab3

And my -n public key starts with 03 =

Code:

03787612ded11193e4bb5490c31d24c5a75bcec9fda0f794979556aec260990ab3

So one is a negative number as far as elliptic curve concerns, we call it -n and my original key is +n.

Now if you take the -n public key and add to it, you'd be actually subtracting from my +n key, so as my +n key is growing smaller, so does my -n key, because they are both moving towards the end of the line which for my -n is N itself and for my +n key the end is 0.
Now if you don't know whether the key you are dealing with is -n or +n, you could try to subtract from -n key, while you'd be actually adding the -n key to whatever you were trying to subtract from it, so if you don't know - or +, all operations performed could be backwards, addition could be subtraction and vice versa.

First you'd have to understand the add/subtract functions on elliptic curves, you need to know what negative in negative means, what negative in positive means and then you could do things the right way. ( I'm not there yet though).

Another thing you could do is division, if you multiply my +n public key with this :

Code:

7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0

Since my +n private key ends with 9 when converted to decimal, multiplying it by the key above would divide my -n key by 2 because the -n key ends with 8 and is an even number which we could divide by 2, however if you add G or 1 to my +n key it will become an even number and you could divide it.

Furthermore, when you are dividing a key by N/2 aka the above key, it doesn't matter which key you are using, either +n or -n would do the same, only if the +n is even, otherwise good luck running on a never ending loop of divisions.

Sometimes, when you are subtracting from a puzzle public key, some of the results are even numbers, you could divide them by 2, that way you'd be 50% ahead of the game.
Here is another trick you didn't know about, when you are using key sub tool, if you do -a -s together and then subtract the 2 keys which are next to each other, one has # - something and one has # + something, subtracting those 2 public keys would result in double of your target key. Be careful when you do that because the key before # - sign is -n, subtracting it from any key means addition, just switch it's x coordinate if it is 02, change it to 03 and if it is 03 change it to 02 before doing the subtraction, you would know you are doing it right when you multiply your target by 2 and having it to compare with the results of your subtraction.

There now, you have just learned 1 year worth of going to university in 30 minutes. 🤣

Ps, I wonder, if I know all these stuff, why can't I do any jack? These questions keep me up at days, since I sleep at nights. Lol^125.