perplexus.info :: Numbers : A surprising prime gap

A surprising prime gap (Posted on 2016-07-27)

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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Subject	Author	Date
re(5): My solution	Charlie	2016-08-01 07:57:10
re(4): My solution	Jer	2016-07-31 21:45:02
re(3): My solution	Charlie	2016-07-31 18:45:10
re(2): My solution	Ady TZIDON	2016-07-31 02:21:06
re: My solution	Math Man	2016-07-30 20:37:42
re: My solution	Charlie	2016-07-30 09:13:56
My solution	Jer	2016-07-27 18:05:19
computer solution	Charlie	2016-07-27 16:45:07

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