It's not clear where you're going with this. You can create any mapping for the keys, but you still have to iterate through all of them, so what's the point?
Probability theory.
Someone starts the search from the end, someone goes through the ranges. And I want to try this way. Rather, I realized this, but on the php, and the speed is small, only 13K keys per second.
2019-09-29 20:39:07 222312390859770514489418809920 F:0 C1:3899535 C2:296364660 In sec 12964 var. In min 777860 var
2019-09-29 20:40:07 218598570004008863471606530624 F:0 C1:3909466 C2:297119416 In sec 12963 var. In min 777799 var
2019-09-29 20:41:07 221069917349776220271478669888 F:0 C1:3919395 C2:297874020 In sec 12962 var. In min 777738 var
2019-09-29 20:42:07 221688887221883522150213976640 F:0 C1:3929287 C2:298625812 In sec 12961 var. In min 777671 var
2019-09-29 20:43:07 221693344693121491067113669184 F:0 C1:3939217 C2:299380492 In sec 12960 var. In min 777611 var
2019-09-29 20:44:07 220450266607233054658515010112 F:0 C1:3949461 C2:300159036 In sec 12960 var. In min 777614 var
2019-09-29 20:45:07 219213006736295439409437049408 F:0 C1:3959598 C2:300929448 In sec 12959 var. In min 777595 var
222312390859770514489418809920 hese are the keys in decimal format that were at the time of the output of the string.