mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Blogorrhea > sweety439

Reply
 
Thread Tools
Old 2017-01-04, 18:17   #12
sweety439
 
sweety439's Avatar
 
Nov 2016

23·97 Posts
Default

Found the prime (498-1)*498^1937+1.
sweety439 is online now   Reply With Quote
Old 2017-01-04, 18:46   #13
lalera
 
lalera's Avatar
 
Jul 2003

10010011012 Posts
Default

hi,
i read somewhere in this forum that you can not open *.7z files
you may try this:
https://convertio.co/de/7z-zip/
if this does not help i do offer to you the following:
you do send me the *.7z file(s)
and i do them to *.zip files
lalera is offline   Reply With Quote
Old 2017-01-05, 05:58   #14
S485122
 
S485122's Avatar
 
Sep 2006
Brussels, Belgium

2×5×157 Posts
Default

Quote:
Originally Posted by lalera View Post
hi,
i read somewhere in this forum that you can not open *.7z files
you may try this:
https://convertio.co/de/7z-zip/
if this does not help i do offer to you the following:
you do send me the *.7z file(s)
and i do them to *.zip files
Please !

Don't send people to dubious adware sites...

Just use 7zip it is open source free-ware for Windows to be found at http://www.7-zip.org.

If you can't open such files in Linux install the p7zip package that is available in most distributions.

Jacob
S485122 is offline   Reply With Quote
Old 2017-01-05, 06:18   #15
Batalov
 
Batalov's Avatar
 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

22·2,281 Posts
Default

The whole 7zip sub-story in this topic is an hilarious red herring!

It was never an issue.

If anything ever was an issue here, then it would have been well described by the half a century old joke programmed by evil sysadms on some consoles:
"User error. Replace the user and strike any key when ready."
It seems that inept users existed long before this forum.
Batalov is offline   Reply With Quote
Old 2017-01-21, 11:38   #16
sweety439
 
sweety439's Avatar
 
Nov 2016

23×97 Posts
Default

There are researches for this problem:

http://mersenneforum.org/showthread.php?t=6131

http://mersenneforum.org/showthread.php?t=8765
sweety439 is online now   Reply With Quote
Old 2017-01-25, 08:22   #17
sweety439
 
sweety439's Avatar
 
Nov 2016

1000101101112 Posts
Default

These are primes of the form (b-1)*b^n+1 for 2<=b<=300, 1<=n<=512.
Attached Files
File Type: txt numbers k such that (n-1)n^k+1 is prime.txt (6.0 KB, 50 views)
sweety439 is online now   Reply With Quote
Old 2017-01-25, 08:23   #18
sweety439
 
sweety439's Avatar
 
Nov 2016

223110 Posts
Default

Quote:
Originally Posted by lalera View Post
hi,
i gave the formula i do search for
2017*2018^n-1
Did you find some base 2018 primes? You said that you searched for (2018-1)*2018^n-1.
sweety439 is online now   Reply With Quote
Old 2017-01-25, 13:57   #19
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

2×3×983 Posts
Default

For this form check out http://harvey563.tripod.com/NearGeneralizedWoodall.txt.
rogue is online now   Reply With Quote
Old 2017-01-25, 17:42   #20
sweety439
 
sweety439's Avatar
 
Nov 2016

23·97 Posts
Default

Quote:
Originally Posted by rogue View Post
No, this website is about primes of the form (n+-1)*b^n+-1, but my research is about primes of the form (b+-1)*b^n+-1.

Last fiddled with by sweety439 on 2017-01-25 at 17:43
sweety439 is online now   Reply With Quote
Old 2017-01-25, 19:02   #21
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

2·3·983 Posts
Default

Sorry, you are correct.
rogue is online now   Reply With Quote
Old 2017-01-27, 11:56   #22
sweety439
 
sweety439's Avatar
 
Nov 2016

23×97 Posts
Default

These are primes of the form (b+-1)*b^n+-1 for 2<=b<=12. (for some bases, there are their search limits in their OEIS page, but for some bases I do not know the search limit. For 6+-, 6++, 7+-, 9+-, 9++, 11+-, 11++, 12+- and 12++, I only searched them to n=1024)

Besides, although there are no OEIS sequence for 4-+, 4+-, 8+- and 8++, they can be given by base 2 sequences:

4-+: A002253 / 2 that are integers.
4+-: A001770 / 2 that are integers.
8+-: A002236 / 3 that are integers.
8++: A002256 / 3 that are integers.
Attached Files
File Type: txt primes of the form (b+-1)b^n+-1.txt (5.7 KB, 116 views)

Last fiddled with by sweety439 on 2017-01-27 at 12:19
sweety439 is online now   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Search primes of form 2*n^n ± 1 JeppeSN And now for something completely different 27 2018-04-12 14:20
Primes of the form n+-phi(n) carpetpool carpetpool 3 2017-01-26 01:29
Infinitely many primes of a form? PawnProver44 Homework Help 1 2016-03-15 22:39
Primes of the form a^(2^n)+b^(2^n) YuL Math 21 2012-10-23 11:06
Primes of the form 2.3^n+1 Dougy Math 8 2009-09-03 02:44

All times are UTC. The time now is 21:13.

Fri Sep 18 21:13:38 UTC 2020 up 8 days, 18:24, 1 user, load averages: 1.69, 1.78, 1.77

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.