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  "aliases": [
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  "body": "\n## Summary\n\nIn recreational mathematics, a **Keith number** or **repfigit number** (short for **rep**etitive [[**F**ibonacci-like|0GA9K57A39]] d**igit**) is a [[natural number|0MWKJ44V5A]] $n$ in a given number base $b$ with $k$ digits such that when a sequence is created such that the first $k$ terms are the $k$ digits of $n$ and each subsequent term is the sum of the previous $k$ terms, $n$ is part of the sequence. Keith numbers were introduced by Mike Keith in 1987. They are computationally very challenging to find, with only about 125 known.\n",
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