I'm just confused a little bit.
The challenge is the solve a 80 bit key which is 20 HEX but the challenge shows a way longer private key than the maximal 64 HEX or 256 bits.
Can anyone explain those mystery keys?
minKey = 0x659756abf6c17ca70e0000000000000000000140be6ddd93e441f8d4b4a85653b20b4cdcc5c748207a0daa16191d07a425d8080c276f9412472e0429e61bc355
maxKey = 0x659756abf6c17ca70fffffffffffffffffffff40be6ddd93e441f8d4b4a85653b20b4cdcc5c748207a0daa16191d07a425d8080c276f9412472e0429e61bc355