Come down friend. There are not mathematically is just Random. I try many theory mathematics and found some rule of puzzle. There are never complete.
If you like lottery of bitcoin. Try your luck.

I know all build with math. Hard to find the formula of puzzle but the private key is really exist.
Nice explain. Thanks.

This will never happen .. even on 160 bit range .. will never happen .. i am more likely to become the president of the US without having its nationality than we breaking the elliptic curve .. you're dealing with numbers as much as almost the number of atoms of the known universe .. but for solving puzzles, it can happen, good luck everyone.

Going back to this... So you drop it 50 bit... Get your insane number of public keys. Theoretically if you then Kangaroo it and get the private key in the range of 75...What's the following process?

Firstly it would take at least a year and a very large hard drive to generate that many keys. but if you did and somehow found the key on 75 then you  convert that key to decimal and multiply this by 1,125,899,906,842,624 and convert back to hex for the 125 key.

Thanks for the response guys, I was just more curious than anything.

in 3 months maximum it will be discovered

From  
addr: c.   1MRxjnjFDhZfjtjgpxBNczsMGVEtYqfFyS    u.  1Jy6aHcRTWjiPN9DpjZztk2F8xY9iNsaj2
020000000000000000000000000000000000000000000000000000000000000001
040000000000000000000000000000000000000000000000000000000000000001483ada7726a3c 4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8
```````
```````all hex range of x
```````
```````
to
addr: c.  1LCQXAGayRCWdAGrh7NKWEcyQNfbbxPdtw    u.   1F18os1CipgxyUj9wBMY4yK1HEVUaub2Nr
02ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
04ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff483ada7726a3c 4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8

there are addresses with public keys where the coordinate y is the same.

More interesting is the fact that, the public key 02ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff is the correspondence for the same addresses  1LCQXAGayRCWdAGrh7NKWEcyQNfbbxPdtw as 0200000000000000000000000000000000000000000000000000000001000003d0 and continuing like this, if we change the value of the y-coordinate of the public key, for each even/odd value it seems the compressed address is the same:
1LCQXAGayRCWdAGrh7NKWEcyQNfbbxPdtw
0400000000000000000000000000000000000000000000000000000001000003d00000000000000 000000000000000000000000000000000000000000000000002

1KmKgQHBMbequmyi9uP1yfa1vsNjdsjyEz
0400000000000000000000000000000000000000000000000000000001000003d00000000000000 000000000000000000000000000000000000000000000000003

1LCQXAGayRCWdAGrh7NKWEcyQNfbbxPdtw
0400000000000000000000000000000000000000000000000000000001000003d00000000000000 000000000000000000000000000000000000000000000000004

1KmKgQHBMbequmyi9uP1yfa1vsNjdsjyEz
0400000000000000000000000000000000000000000000000000000001000003d00000000000000 000000000000000000000000000000000000000000000000005
`````
`````an so on
1LCQXAGayRCWdAGrh7NKWEcyQNfbbxPdtw
0400000000000000000000000000000000000000000000000000000001000003d0fffffffffffff fffffffffffffffffffffffffffffffffffffffffffffffffff

I could conclude from here that any compressed public address exists as many times as there are for each uncompressed address and vice versa, and the mathematical space of the corresponding keys that generate them is much larger and can be treated as a three-dimensional space.

play a little with the application below and convince yourself

https://iancoleman.io/bitcoin-key-compression/

all keys are 100% valid

(for uncompressed keys remove the spaces after copy/paste from here)