![]() Yeah, a collision is possible, but not like winning the lottery is possible. Created randomly, no one will ever create a random Bitcoin address that someone else already created. Anyone can generate a new Bitcoin address using random data (or have a service do it for you), but how do you make sure you didn't choose an address that someone else already chose? For example, if someone created a paper wallet but has never used it, it won't appear on the blockchain, so how do you know whether someone else already chose your address? The answer is you don't need to know: If a million people each created a million new Bitcoin addresses every second for billions of years.same principle. With all those decks, in all that time, it's unlikely that exactly there would ever be two matching decks of cards.Īnother large number is the possible number of Bitcoin addresses: 1.4 x 10 48. If a million people each shuffled a million decks of cards every second from now until the end of the earth (best guess = 8 billion years), that would be only 2.56 x 10 29 decks. ![]() ![]() ![]() That's about 8.07 x 10 67, or 8 with 67 zeroes after it. The number of distinct results for shuffling a deck of cards is 52!, or 52 x 51 x 50 x 49, etc. ![]()
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