mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > XYYXF Project

Reply
 
Thread Tools
Old 2020-01-10, 22:58   #320
pxp
 
pxp's Avatar
 
Sep 2010
Weston, Ontario

167 Posts
Default

Quote:
Originally Posted by pxp View Post
I count 160 unindexed primes in my list. I'm going to be adding some more cores to the project next month, so I'm looking forward to seeing what the number will be in six months.
So it is six months later and the number of unindexed primes is still 160. Clearly I did not appreciate when I wrote the above that new prime finds beyond the intervals in which I test every Leyland number are keeping pace with unindexed terms in those intervals that subsequently acquire indices. This situation is not likely to change appreciably for another 14 months (or so) when I finally bridge to the primes with ~100000 decimal digits.
pxp is online now   Reply With Quote
Old 2020-01-15, 00:20   #321
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

10111112 Posts
Default

Another new PRP:
17275^18246+18246^17275, 77316 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-01-18, 11:29   #322
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5·19 Posts
Default

Another new PRP:
2618^26175+26175^2618, 89466 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-01-24, 21:29   #323
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5·19 Posts
Default

Another new PRP:
2996^26241+26241^2996, 91228 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-02-04, 22:50   #324
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5·19 Posts
Default

Another new PRP:
18090^18307+18307^18090, 77941 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-02-05, 22:17   #325
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5·19 Posts
Default

Another new PRP:
18226^18359+18359^18226, 78223 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-02-19, 21:23   #326
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5·19 Posts
Default

Another new PRP:
2816^26445+26445^2816, 91226 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-02-20, 19:21   #327
pxp
 
pxp's Avatar
 
Sep 2010
Weston, Ontario

167 Posts
Default Trivia

Of the currently 1671 known Leyland primes, only one has an L(x,y) where x and y are (base-10) anagrams of each other.
pxp is online now   Reply With Quote
Old 2020-02-22, 22:04   #328
pxp
 
pxp's Avatar
 
Sep 2010
Weston, Ontario

167 Posts
Default

Quote:
Originally Posted by pxp View Post
That makes L(30247,300) #1470.
I have examined all Leyland numbers in the four gaps between L(30247,300) <74926>, #1470, and L(40089,82) <76723> and found 22 new primes. That makes L(40089,82) #1496.
pxp is online now   Reply With Quote
Old 2020-02-28, 08:20   #329
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

9510 Posts
Default

Another new PRP:
2126^26511+26511^2126, 88218 digits.
NorbSchneider is offline   Reply With Quote
Old 2020-03-08, 22:50   #330
NorbSchneider
 
NorbSchneider's Avatar
 
"Norbert"
Jul 2014
Budapest

5F16 Posts
Default

Another new PRP:
19690^19941+19941^19690, 85632 digits.
NorbSchneider is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Leyland Primes: ECPP proofs Batalov XYYXF Project 16 2019-08-04 00:32
Mersenne Primes p which are in a set of twin primes is finite? carpetpool Miscellaneous Math 3 2017-08-10 13:47
Distribution of Mersenne primes before and after couples of primes found emily Math 34 2017-07-16 18:44
On Leyland Primes davar55 Puzzles 9 2016-03-15 20:55
possible primes (real primes & poss.prime products) troels munkner Miscellaneous Math 4 2006-06-02 08:35

All times are UTC. The time now is 16:14.

Mon Sep 28 16:14:12 UTC 2020 up 18 days, 13:25, 1 user, load averages: 1.64, 1.67, 1.73

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.