Mathematics, 28.03.2021 14:40, lashaaungas

The number 2021 = 43 · 47 is composite. Prove that if we insert any number of digits “8” between 20 and 21 then the number remains composite.

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The number 2021 = 43 · 47 is composite. Prove that if we insert any number of digits “8” between 20...