2.5 gigabytes of public keys. Before starting the search, need to know how many bits are in the key. Or did the author collect all known public keys with a balance or invented them myself?And the keys are most likely changed. If you find a private key with 500 bitcoins, why do you share with someone? kangaroo work with only one key. And in what space look for a key? 0-256 bits?no one gpu kangaroo can no scan all 256 bits.scam.