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A surprising prime gap (Posted on 2016-07-27) Difficulty: 3 of 5
N is a positive integer. If you list the positive integers in rows of N such that the first row contains 1 to N, the second row contains N+1 to 2*N, and so on, then the first row with no prime is immediately followed by another row with no prime. What is N?

See The Solution Submitted by Math Man    
Rating: 5.0000 (1 votes)

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Question re(2): My solution | Comment 5 of 8 |
(In reply to re: My solution by Math Man)


Re:

"....When N is large, there will be many gaps containing 1 row before there is a gap containing 2 rows "

We have only your word for it.

Why do you think so? 

 





  Posted by Ady TZIDON on 2016-07-31 02:21:06
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