Quote
Only WIF compressed private keys have 52 characters.
* L3B6ErSDT6JThKiKgP2uT2HRP9nzdArDRtRSgNdChEdn5DFDwoVf is private key compressed.
The uncompressed private key would have 51 digits.
Could you calculate an uncompressed private key?
Yes it is possible after some processing, here is an example with your above WIF compressed private key.
Code:
Compressed WIF private key.
L3B6ErSDT6JThKiKgP2uT2HRP9nzdArDRtRSgNdChEdn5DFDwoVf
1. Convert WIF Compressed to a byte string using Base58Check encoding.
80B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE2016CF7A0E6
2. Remove the last 5 Bytes (1 "Compress flag" Byte + 4 Checksum Bytes).
80B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE2
3. Remove the 1 Byte(Version Byte 0x80).
B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE2
4. Now you have the private key.
B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE2
5. Add version Byte to the front(0x80).
80B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE2
6. Perform SHA-256 hash on 5.
8073DE6EF5F032F8A2F8BADD0AFC36E76C36632B92F81B5CEF99E9B1CC1E628F
7. Perform SHA-256 hash on 6.
9985CF7A93E94280F204D605C3581D0B1EA50E91E6085C7AE664F11097EE5514
8. Take the first 4 bytes of the second SHA-256 hash, this is the checksum.
9985CF7A
9. Add the 4 checksum Bytes to the end of what you got on 5.
80B1AD3B4DD66B34C8733077F7490ACF9007CCB833B6B4346B2515B784455E9BE29985CF7A
10. Convert the result from a byte string into a base58 string using Base58Check encoding.
5KAY6QSCRwfr6WceJz6sQ7doJhxjWVWjEo65usfZZE4MBY8b7cM
If I haven't made any mistakes during the process,your WIF private key should be 5KAY6QSCRwfr6WceJz6sQ7doJhxjWVWjEo65usfZZE4MBY8b7cM
Do Multi-signature addresses fulfill the same characteristics (number digits)?
A multi-signature address is basically the same as a normal public address, except for they always begins with a '3', instead of a '1'.