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?
Do Multi-signature addresses fulfill the same characteristics (number digits)?