Quote 2015-01-15 - a transaction was created in blockchain (included in block 339085) containing a transfer transaction for 256 different Bitcoin addresses: https://blockchain.info/tx/08389f34c98c6...1e5fa6cd15 2017-07-11 - funds from addresses 161-256 were moved to the same number of addresses of the lower range - thus increasing the amount of funds on them. This takes place in block 475240: https://www.blockchain.com/btc/tx/5d4558...4544384164 2019-05-31 - the creator of the "puzzles" creates outgoing transactions with the value of 1satoshi for addresses #65, #70, #75, #80, #85, #90, #95, #100, #105, #110, #115 , #120, #125, #130, #135, #140, #145, #150, #155, #160 with the aim of probably comparing the difficulty of finding a private key for the address from which such a transaction was carried out, and one that There is no transaction.