mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.22 seconds.
Search: Posts Made By: robert44444uk
Forum: Prime Gap Searches 2020-12-02, 08:00
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
I ran the program - it took about 2 seconds to...

I ran the program - it took about 2 seconds to produce the results below. It needs code in there to sort the file by absolute value of remaining candidates.

My strategy looked at a range of 1...
Forum: Prime Gap Searches 2020-11-28, 13:48
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
For very large gaps I used the sieve_primes...

For very large gaps I used the sieve_primes routine and then pfgw. Here is a ready to use perl program - clearly change your variables. It produces a pfgw-ready file.


#!/usr/bin/env perl

#...
Forum: Puzzles 2020-11-28, 11:23
Replies: 34
Views: 916
Posted By robert44444uk
Got to love it. The newspapers need to be...

Got to love it.

The newspapers need to be told - the World needs to know :alien:

I suggest the Daily Mail or the Sun in the UK, and Fox News for the telly. And the boys and girls in QAnon, and...
Forum: Puzzles 2020-11-26, 11:01
Replies: 34
Views: 916
Posted By robert44444uk
Certainly not the smallest, but has some symmetry...

Certainly not the smallest, but has some symmetry and uses 5 operators, +,-,^,/,()
...
Forum: Prime Gap Searches 2020-11-14, 09:05
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Cool! The megagaps I found were based on a...

Cool!

The megagaps I found were based on a deep sieve of promising candidates (perl program) and pfgw for the intermediate composite checking. My largest gap (5m+) took three months to find.
Forum: Prime Gap Searches 2020-11-03, 15:46
Replies: 113
Views: 13,857
Posted By robert44444uk
Hi henryzz - generally speaking we do sieve over...

Hi henryzz - generally speaking we do sieve over A in our deficient primorial searches - A is favoured when 5mod30 or 25mod30, but others also get a look in - so I tend to look at...
Forum: Prime Gap Searches 2020-10-30, 15:39
Replies: 113
Views: 13,857
Posted By robert44444uk
There are two major approaches at the moment. ...

There are two major approaches at the moment.

Deficient primorials of the form A*p#/d form the majority of gap records, given that it is at a midpoint of a relatively smooth range 4 merits wide,...
Forum: Prime Gap Searches 2020-10-29, 09:54
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
We can now add 117242 to that list

We can now add 117242 to that list
Forum: Prime Gap Searches 2020-10-29, 08:05
Replies: 113
Views: 13,857
Posted By robert44444uk
Hi Seth It would be useful, in this and your...

Hi Seth

It would be useful, in this and your other post, #98 if you could explain your variables - so what is "m", "d", "p" "X" - generally, for deficient primorial multiples we have tended to use...
Forum: Lounge 2020-10-26, 07:14
Replies: 1,557
RIP
Views: 113,184
Posted By robert44444uk
Kenneth Conrow RIP died 28 March 2019, - he is...

Kenneth Conrow RIP died 28 March 2019, - he is credited in the bibliography relating the search for prime gaps, but his prime gap records have all been superseded so that none of the current prime...
Forum: Prime Gap Searches 2020-10-24, 14:41
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
I just found the second largest merit 30 gap...

I just found the second largest merit 30 gap ever:

The list will look like this when I post it - top 20 30-merit gaps


309030 31.7822 Rosnthal
214090 30.5885 RobSmith
203890 35.6402 RobSmith...
Forum: Prime Gap Searches 2020-10-24, 06:56
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Now found

Now found
Forum: Prime Gap Searches 2020-10-19, 08:29
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Very pretty - I would take the top of the CFC...

Very pretty - I would take the top of the CFC line and code as "Mersenne Prime Gap Search" (PGS) given the efforts of this group to get the search to 2^64 a couple of years back.

On a selfish...
Forum: Prime Gap Searches 2020-10-18, 07:28
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
This graph just goes to show how puny our efforts...

This graph just goes to show how puny our efforts are, and how many really big (40+ merit) gaps there are out there!
Forum: Prime Gap Searches 2020-10-15, 11:33
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
LGTM :)

LGTM :)
Forum: Prime Gap Searches 2020-10-14, 08:19
Replies: 113
Views: 13,857
Posted By robert44444uk
Here's one for the mathematicians: Two...

Here's one for the mathematicians:

Two prime gaps - the first is a first occurrence, the second is the smallest found to date, but probably not first occurrence.

1430 4606937813294064947...
Forum: Prime Gap Searches 2020-10-07, 10:21
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Envy!

Envy!
Forum: Prime Gap Searches 2020-10-06, 08:26
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
That is sooo cool!

That is sooo cool!
Forum: Prime Gap Searches 2020-10-06, 08:25
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
The "M Jansen" records appear only as...

The "M Jansen" records appear only as "M"
Forum: Prime Gap Searches 2020-10-05, 08:18
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Does this mean I need to submit those 2000+...

Does this mean I need to submit those 2000+ records again? Or do you have them somewhere?
Forum: Prime Gap Searches 2020-10-04, 09:49
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Hmmm, the 2000+ have left the queue! I wonder...

Hmmm, the 2000+ have left the queue! I wonder what happened to them?
Forum: Prime Gap Searches 2020-10-03, 15:15
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
I posted those, and it turns out that only the...

I posted those, and it turns out that only the records that improved had been previously upgraded, and not the records of new gaps. These are now posted, along with many other records I found in the...
Forum: Prime Gap Searches 2020-10-03, 12:39
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Hmmm, that's interesting. I found two files I...

Hmmm, that's interesting. I found two files I sent you, Aug-Nov 2019, and Dec 2019. I sent these to you on 10-1-2020. The December 2019 file appears to have already been processed, as there are no...
Forum: Prime Gap Searches 2020-10-03, 07:26
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Ahh, the mysterious M is now known. Not a James...

Ahh, the mysterious M is now known. Not a James Bond character after all :)
Forum: Prime Gap Searches 2020-10-01, 09:11
Replies: 204
Sticky: Prime Gap News
Views: 29,473
Posted By robert44444uk
Now known!

Now known!
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 11:23.

Fri Dec 4 11:23:51 UTC 2020 up 1 day, 7:35, 0 users, load averages: 2.02, 1.74, 1.56

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.