5999999
This number is a composite.
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The only brilliant number less than a googol of form
x*10^x-1 for x a number, (case x=6), i.e.,6*10^6-1=5999999
= 1013 × 5923. [Loungrides]
Submitted: 2020-02-26 08:19:52; Last Modified: 2026-04-18 15:18:52.
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