I was free today and restored the key to decimal 😹

The blockchain key is actually a 56-bit string of numbers presented in hexadecimal.

So it can be restored to decimal, and after restoration, a 56-bit key is obtained.

It seems that the 56-bit wallet key is not very long, but if you convert 10 to the 56th power = 1 to the 40th power, you suddenly can't read it.