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Old 2022-05-07, 08:44   #1
sweety439
 
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"99(4^34019)99 palind"
Nov 2016
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Quote:
Originally Posted by Puzzle-Peter View Post
There are so many interesting numbers from 50K to 100K digits.
There is a much smaller interesting number: (64*10^10906+53)/9, with "only" 10907 digits, which is 7111...1117 with 10905 1's, and is the smallest (probable) prime of the form 7111...1117 (see https://stdkmd.net/nrr/7/71117.htm), but this number seems not be proven prime (and hence there is no known definitely prime of the form 7111...1117), can someone prove the primality of this number? (there are many numbers large than it and neither N-1 nor N+1 can be >= 1/3 factored and are definitely primes)

Last fiddled with by sweety439 on 2022-05-07 at 09:07
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Old 2022-05-07, 09:55   #2
xilman
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Quote:
Originally Posted by sweety439 View Post
There is a much smaller interesting number: (64*10^10906+53)/9, with "only" 10907 digits, which is 7111...1117 with 10905 1's, and is the smallest (probable) prime of the form 7111...1117 (see https://stdkmd.net/nrr/7/71117.htm), but this number seems not be proven prime (and hence there is no known definitely prime of the form 7111...1117), can someone prove the primality of this number? (there are many numbers large than it and neither N-1 nor N+1 can be >= 1/3 factored and are definitely primes)
Yes, someone can do this.

You, for instance.
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Old 2022-05-07, 10:56   #3
sweety439
 
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Originally Posted by xilman View Post
Yes, someone can do this.

You, for instance.
Well, can someone update the Windows version of Primo?
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Old 2022-05-07, 11:12   #4
paulunderwood
 
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Quote:
Originally Posted by sweety439 View Post
Well, can someone update the Windows version of Primo?
Like me, Marcel Martin, the author of Primo, loathes Windows. He has good reason to do so as well. You are under a delusion that someone should "update the Windows version". Get real. Install Linux. Then you can run Primo to your heart's content. Better still, you can learn how to configure and run fastECPP. I believe Windows now facilitates a Linux virtual install through WSL2. The ball is in your court!

Last fiddled with by paulunderwood on 2022-05-07 at 11:14
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Old 2022-05-07, 11:13   #5
Batalov
 
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Quote:
Originally Posted by sweety439 View Post
Well, can someone update the Windows version of Primo?
Sure. You can. And when you will - it will take you ~ a year using that 11-year old abandoned single-threaded version.

While with Linux version you can do it in just a couple days maybe even less. Just get an AWS spot node with most cores, set up libX11, gtk2 and go! At a total cost of 20-40 bucks. Why don't you come to anyone on the street and request they'd give you $40? Get real. Earn money at the main job, spend it on your hobbies. That's the way the world works.

Even better, get to install, compile and use the new fastECPP - it is opensource and is demonstrated faster than Primo. There is no better way to get familiar with compilers and with MPI; and the skills that you will get are reusable and valuable on any CV.

What part of Marcel's FAQ is unclear?
Quote:
Originally Posted by https://ellipsa.eu/public/primo/primo.html#FAQ
Does it exist a Primo version for an other operating system than Linux?
No, there is not and there will not be.
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