mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Miscellaneous Math

Reply
 
Thread Tools
Old 2021-03-01, 20:48   #1
paulunderwood
 
paulunderwood's Avatar
 
Sep 2002
Database er0rr

3,617 Posts
Default List of candidates by crazy formula

Based on the "test" lift(Mod(420,p^2-1)^p)%p==0 I get this partial list of exponents

Code:
3 
5 
7 
11 
13 
17 
19 
29 
31 
41 
71 
97 
127 
251 
449 
653 
709 
4801 
23209 
1887607 
101367503 
440280287 
484949303 -- being tested by paulunderwood
802630799 -- factored by Runtime_Error
874157399 -- being tested by Runtime_Error
3369491999 
3439211999 
4674125903 
9865144799

Last fiddled with by paulunderwood on 2021-03-02 at 05:15
paulunderwood is offline   Reply With Quote
Old 2021-03-01, 21:21   #2
Stargate38
 
Stargate38's Avatar
 
"Daniel Jackson"
May 2011
14285714285714285714

23·34 Posts
Default

I noticed that the following known Mersenne primes appear in that list:

M3
M5
M7
M13
M17
M19
M31
M127
M23209

And of course the ones it missed:

M2 (3)
M61
M89
M107
M521
M607
M1279
M2203
M2281
M3217
M4253
M4423
M9689
M9941
M11213
M19937
M21709

Also, it misses all known Mersenne primes ≥M44497.

Last fiddled with by Stargate38 on 2021-03-01 at 21:22
Stargate38 is online now   Reply With Quote
Old 2021-03-02, 01:19   #3
Runtime Error
 
Sep 2017
USA

111010112 Posts
Default

This kind of stuff is fun, I'll work on 802630799 for at least a little while!

Edit: Wow, that was fast:
Code:
M802630799 has a factor: 9484935847803593677223 [TF:73:74*:mfaktc 0.21 barrett76_mul32_gs]
Might as well try my luck on 874157399 next!

Last fiddled with by Runtime Error on 2021-03-02 at 01:38
Runtime Error is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
crazy Mersenne test paulunderwood Miscellaneous Math 9 2021-01-05 02:41
What's up with the crazy questions for profile edits? willmore Forum Feedback 2 2017-02-02 12:44
Crazy question... guido72 Software 6 2008-08-16 02:34
My Prime95 is going crazy!! xago666 Information & Answers 2 2008-03-12 18:38
crazy WinXP scheduling stippix Software 0 2004-04-22 08:55

All times are UTC. The time now is 20:53.

Wed Apr 14 20:53:47 UTC 2021 up 6 days, 15:34, 0 users, load averages: 2.53, 2.32, 2.34

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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.