When importing my private key in www.omniwallet.org or when I enter it in www.bitaddress.org it shows a different address than my electrum.
It is about the following address (in electrum) : 3Jnz4bDfgmB9DYiZkxZX53rnYyWb3XG2pQ.
I read somewhere that an address starting with a 3 (is p2sh? and) can have multiple private keys and that it is possible that I have the wrong one. How do I retrieve the right private key corresponding to this address? Thanks in advance.