I copied my private key to a file and I can't remember what the string begins with. Can you help me by giving me the different types of private key: number of characters and and with which characters the private keys start. This is a bitcoin key from 2011/2012.
Ian's BIP39 site will show you an example of pretty much every coins private key format. Technically these are WIF encoded private keys, but I assume these are what you mean.
[what are] the different types of private key: number of characters and and with which characters the private keys start.
I have this note from https://en.bitcoin.it/wiki/List_of_address_prefixes
|Decimal prefix||Hex||Example use||Leading symbol(s)||Example|
|128||80||Private key (WIF, uncompressed pubkey)||5||5Hwgr3u458GLafKBgxtssHSPqJnYoGrSzgQsPwLFhLNYskDPyyA|
|128||80||Private key (WIF, compressed pubkey)||K or L||L1aW4aubDFB7yfras2S1mN3bqg9nwySY8nkoLmJebSLD5BWv3ENZ|
|4 136 173 228||0488ADE4||BIP32 private key||xprv||xprv9s21ZrQH143K24Mfq5zL5MhWK9hUhhGbd45hLXo2Pq2oqzMMo63o StZzF93Y5wvzdUayhgkkFoicQZcP3y52uPPxFnfoLZB21Teqt1VvEHx|
|239||EF||Testnet Private key (WIF, uncompressed pubkey)||9||92Pg46rUhgTT7romnV7iGW6W1gbGdeezqdbJCzShkCsYNzyyNcc|
|239||EF||Testnet Private key (WIF, compressed pubkey)||c||cNJFgo1driFnPcBdBX8BrJrpxchBWXwXCvNH5SoSkdcF6JXXwHMm|
|4 53 131 148||04358394||Testnet BIP32 private key||tprv||tprv8ZgxMBicQKsPcsbCVeqqF1KVdH7gwDJbxbzpCxDUsoXHdb6SnTPY xdwSAKDC6KKJzv7khnNWRAJQsRA8BBQyiSfYnRt6zuu4vZQGKjeW4YF|