Has 666/888
The devil and the fortune god, both hiding in the digits.
The digit string contains 666 or 888 anywhere — 16662, 988812, 666888. Position doesn’t matter; buried in the middle counts just the same.
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There are 7,398 such numbers, about 0.74%. This is the only feature in the registry that names specific substrings: other detectors look at structure, this one literally searches for 666 and 888.
The selection is pure culture: 666 is the western “number of the beast” and a Chinese-internet exclamation of awe (“smooth as 666”), while 888 sounds like “triple fortune” and is the most prized digit combo in the Chinese world. One feature serving two superstitions.
Since 666 and 888 are triples themselves, every hit here is a subset of Triple; grow the run by one (6666) and a Quad comes along. Like all meme flavor, it earns natural entropy only — no hand-tuned bonus.