perplexus.info :: Just Math : Jeopardy style

Jeopardy style (Posted on 2018-09-23)

Answer: To get the largest N-digit prime one only needs to subtract N from 10^N.

Jeopardy style question: What is N?

Your task : evaluate N.

See The Solution Submitted by Ady TZIDON

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One answer (spoiler)

| Comment 1 of 2

What is 3?

10^3 - 3 = 997, the largest 3 digit prime.

There may be other, larger, jeopardy style questions that satisfy.

Posted by Steve Herman on 2018-09-23 07:43:20

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