Why is it that every 5 puzzles from puzzle 135 onwards, one puzzle has its public key revealed, while the surrounding puzzles do not?
2019-05-31: the creator of the "puzzles" creates outgoing transaction with the value of 1000 satoshi 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.