Quote from: digaran on Today at 05:52:48 PM

Quote from: kalos15btc on Today at 05:08:16 PM

hi guys, im working on puzzle 125 for a long time, today, i have substracted the public key (im always test and substract by random) of 125 to a smaller range randomly i found a substracted key his hash160 start with the same 4 lettres as a hash160 of an adress in the range 110 bit, so, am i close to find it ? if i search this substracted public key in 110 bit range will i found it ? the probleme im runing 7TerraK per sec its slow, and if anyone can help we will split the reward of the puzzle 125,
02a0397a2b74177e0f101ab1cbe9d560ac384c01fd69d7e19593d1ab3155f9ad73
2000000000000000000000000000:3fffffffffffffffffffffffffff
if you have better speed search from 1f00000000000000000000000000:7fffffffffffffffffffffffffff from 109 to 111 bits,

if you have good speed and can finish this range in 1hour, you wont lose nothing, we will split the reward

thank you

How can you search for a 125 bit range public key in 109-111 bit range? And why would you care about the first 4 characters of a hash160 of another random address?
Please explain the magic here.😉

You can shrink a search range via subtraction of a known public key.

If you shrink #125 down to 110 bits, you will create 2^15 new public keys. One of those will be guaranteed to be in the 110 bit range.

I do not understand the initial post of finding the first 4 hash160 characters...IMO, that does not help nor narrow down the search to that one pubkey.