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The tan box in the article explains this set. The multiples are n×618 where the smallest prime factor of n (not of n×618) is ≥103 (if any). I.e. 618, 103×618, 107×618, 109×618, etc.



No, the tan box is similarly non-sensical and the example is 3 primes so it doesn’t explain it either.

Your explanation is clear though, thanks!




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