May 24th, 2019, 11:30 PM  #1 
Senior Member Joined: Dec 2015 From: somewhere Posts: 729 Thanks: 98  Prime number problem
Prove that there is always a prime number in interval $\displaystyle [N,2N]$, for $N$  positive integer. $\displaystyle \exists p \; $ such that $\displaystyle N\leq p \leq 2N$. Last edited by skipjack; May 25th, 2019 at 05:31 AM. 
May 25th, 2019, 05:47 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 21,029 Thanks: 2259 
See this article.


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