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June 22nd, 2016, 05:53 PM  #1 
Newbie Joined: Jun 2016 From: Bradford Posts: 1 Thanks: 0  Prime question
I have a formula to find primes up to a trillion within a range of 40 upwards of the number. So two numbers calculated together I know a prime is within a 40 number range of that sum. 99% within 30 so is this already known? And I realise it could be fluke. occasionally the number is a prime itself. I can't go past a trillion using excel, and guess you get a lot of this, from would bes thinking they've found something. My understanding is that there is hardly any formula that can help you find primes. Thank you. 
June 22nd, 2016, 08:29 PM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,089 Thanks: 849 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan  
June 23rd, 2016, 08:54 AM  #3  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,089 Thanks: 849 Math Focus: Wibbly wobbly timeywimey stuff. 
This is a PM I received from Matthewsx7. Quote:
 
June 23rd, 2016, 05:23 PM  #4 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 550  

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