How To Make A Million

Number Theory Level 4

To "build" a number, you are allowed to perform only two operations, either adding 1 or multiplying by 7.

Starting with zero, what is the fewest number of operations you can perform to "build" 1,000,000?

For example, 50 could be built in a minimum of 4 operations: \(+1\rightarrow \times 7\ \rightarrow\times 7 \rightarrow + 1\) .

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