Abstract
In this paper, we determine all Lucas numbers that are sums of two repdigits. The largest one is L14 = 843 = 66 + 777.
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The author was supported in parts by grants CPRR160325161141 of NRF (South Africa) and CGA 17-02804S (Czech Republic).
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Adegbindin, C., Luca, F. & Togbé, A. Lucas numbers as sums of two repdigits. Lith Math J 59, 295–304 (2019). https://doi.org/10.1007/s10986-019-09451-y
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DOI: https://doi.org/10.1007/s10986-019-09451-y