IMO there is no safe number of keys you can skip after finding a key that generates a wallet with x number of matching prefix characters, they can be a lot closer than one might think, and you definitely risk skipping the key you are looking for if you're skipping some x number of keys before or after you found a prefix match.

In the case of the last solved puzzle #67, the target address was 1BY8GQbnueYofwSuFAT3USAhGjPrkxDdW9.


If you found:

5BC84AD126CAFFF77  1BY8GQbnueqmo6APjMjuhhjSTJ3gmgxkWX
OR
5CA67D5DB93536724  1BY8GQbnue2mAytwUsDNQT7nXpAdjz8Esn

would your "jump" distance caused you to have missed finding

5C030927B184AD552  1BY8GQbnueYcq2Unmocc2sKfSr1DQxoVeG ?



If you found:

64D152AE9B59F66A7  1BY8GQbnue4h6jRrpFUDV5ppCzPnEuH63u

would your "jump" distance caused you to have missed finding

64D14FE23CAC2EDC7  1BY8GQbnueYTZY3TtdEHMguhzFbbD2HipQ ?



If you found:

73076F74563C5D405  1BY8GQbnuexX2LtpirnRDNjZPWVVCvmG2j
OR
73554ADC9CC0579CF  1BY8GQbnueuFzVAFAGNMEjR2SW71hVdRDp

would your "jump" distance, or average, or probability, whatever method you're using, have caused you to miss finding

730FC235C1942C1AE  1BY8GQbnueYofwSuFAT3USAhGjPrkxDdW9 ?