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Search: Posts Made By: MJansen
Forum: Prime Gap Searches 2021-12-07, 14:14
Replies: 56
Views: 22,804
Posted By MJansen
Hi Seth, have you been able to add the...

Hi Seth,

have you been able to add the option to enter large gaps? I have a nice one to add (was hoping for more of course):
5198448 14.335331 363257*363269#/510510-2177806

Kind regards...
Forum: Math 2021-11-16, 10:45
Replies: 60
Views: 6,251
Posted By MJansen
Appreciated! Seemed like a little advanced for me...

Appreciated! Seemed like a little advanced for me but after reading Stewart was the one who worked with Terry Pratchett (the science of discworld I and II) it seems like a good place to start, hope...
Forum: Prime Gap Searches 2021-11-15, 17:48
Replies: 56
Views: 22,804
Posted By MJansen
Hi Robert, Both links appear in my...

Hi Robert,

Both links appear in my webbrowser (Ms Edge) and then I copy the content of the webpage to Excel, so a work around for sure. I agree a more neat and standardized solution would be...
Forum: Prime Gap Searches 2021-11-15, 12:51
Replies: 56
Views: 22,804
Posted By MJansen
Based on a sample of two biased contributions: ...

Based on a sample of two biased contributions:
1. Agreed by the contributers
2. If a known contributer sends in a big gap it will be accepted. A new contributer will be asked to send in his...
Forum: Math 2021-11-15, 09:46
Replies: 60
Views: 6,251
Posted By MJansen
I actually was aware of the p - NP problem...

I actually was aware of the p - NP problem (https://en.wikipedia.org/wiki/P_versus_NP_problem), but since maths is the language of the abstract, I did not think much of using NP as an abbreviation....
Forum: Math 2021-11-12, 09:04
Replies: 60
Views: 6,251
Posted By MJansen
https://en.wikipedia.org/wiki/Fermat%27s_factoriza...

https://en.wikipedia.org/wiki/Fermat%27s_factorization_method

I think the difference between x and y needs to be larger than 1. Otherwise you will have (x+y)(x-y)=(x+y)*1

Kind regards
Michiel
Forum: Prime Gap Searches 2021-11-12, 08:05
Replies: 56
Views: 22,804
Posted By MJansen
Hi Seth, the principles seem sound. My 2...

Hi Seth,

the principles seem sound. My 2 cents regarding your questions:
1. Are we happy with 14% of records being "C??" AKA not verified ?
Yes

2. Should I blindly accept larger records...
Forum: Prime Gap Searches 2021-11-11, 17:38
Replies: 269
Sticky: Prime Gap News
Views: 68,411
Posted By MJansen
And the search has stopped, 12th gap overall in...

And the search has stopped, 12th gap overall in size:

30007411*224737#/30030-1388228
30007411*224737#/30030+1745908

Gap = 3.134.136 with merit = 13.976122
The startvalue of the gap has 97391...
Forum: Math 2021-11-11, 12:03
Replies: 60
Views: 6,251
Posted By MJansen
They say maths is based on observations and I...

They say maths is based on observations and I would like to share mine on the behavior of the composite values (the non primes if you will). I am not a mathematician and will not be able to answer my...
Forum: Prime Gap Searches 2021-11-10, 21:52
Replies: 269
Sticky: Prime Gap News
Views: 68,411
Posted By MJansen
Congrats! Too bad your search was not...

Congrats!

Too bad your search was not prolonged! My search is still running, and as I post this, my search just passed the 3.000.000 mark for gap size with the minus side found (-1.388.228) and...
Forum: Prime Gap Searches 2021-11-07, 22:55
Replies: 269
Sticky: Prime Gap News
Views: 68,411
Posted By MJansen
Good luck with the big one! I am also having a go...

Good luck with the big one! I am also having a go at one and am currently around 24th position and two end points to be found ;-)

Kind regards
Michiel
Forum: Prime Gap Searches 2021-11-04, 18:35
Replies: 48
Views: 4,911
Posted By MJansen
Hi Craig, it is not so much about the...

Hi Craig,

it is not so much about the storage of the in essence boolean value for candidate or composite, but sieving on more gpu cores at the same time. I don't know how to make this clear yet....
Forum: Prime Gap Searches 2021-11-04, 07:57
Replies: 48
Views: 4,911
Posted By MJansen
Hi Craig, you are correct. I do make too many...

Hi Craig,
you are correct. I do make too many calculations atm, mainly because I do not keep to one divider and also because I do not search one primorial at the time, but go through a wide range...
Forum: Prime Gap Searches 2021-11-03, 18:52
Replies: 269
Sticky: Prime Gap News
Views: 68,411
Posted By MJansen
Congrats, indeed a nice one! Have you moved to...

Congrats, indeed a nice one! Have you moved to GPU coding or just to a Unix variant under WSL2? You seem to find more and more gaps over 40.000 these last days?

Kind regards
Michiel
Forum: Prime Gap Searches 2021-11-03, 18:28
Replies: 48
Views: 4,911
Posted By MJansen
I do not have the code, Jens does (C code with...

I do not have the code, Jens does (C code with maybe some machine language incorporated iirc), I only have a compiled exe file for windows and some idea about what it does. But to be clear: every gap...
Forum: Prime Gap Searches 2021-11-01, 21:46
Replies: 48
Views: 4,911
Posted By MJansen
I have to say I really like the way you and Seth...

I have to say I really like the way you and Seth are thinking! Not conventional, but exploring new angles. I am trying to bend my head around the article Seth wrote regarding the hybrid approach and...
Forum: Prime Gap Searches 2021-10-30, 21:25
Replies: 48
Views: 4,911
Posted By MJansen
I did an update on the conceptual gapsearch...

I did an update on the conceptual gapsearch approach I want to take, and am curious if there are other thoughts (discourse is the academical basis for improvement after all):

1. pretest
Steps:...
Forum: Linux 2021-10-30, 14:40
Replies: 30
Views: 5,224
Posted By MJansen
And I just found my first PRP under Ubuntu using...

And I just found my first PRP under Ubuntu using pfgw64, so it works fine!

For the other starters out there that wonder how to run pfgw64 under Ubuntu:
Make a .txt file that has some prime...
Forum: Linux 2021-10-30, 14:25
Replies: 30
Views: 5,224
Posted By MJansen
Crosspost ;-) found it just before you posted,...

Crosspost ;-) found it just before you posted, thanx again!
Kund regards
Michiel
Forum: Linux 2021-10-30, 14:17
Replies: 30
Views: 5,224
Posted By MJansen
To answer my own question: use the source ;-) ...

To answer my own question: use the source ;-)
It ran through the make process without hick-ups this time round!

Note: use the source linked here, not the P95v306b4.source.zip I used earlier ......
Forum: Linux 2021-10-30, 14:02
Replies: 30
Views: 5,224
Posted By MJansen
I get the same error, but without the...

I get the same error, but without the intermitting errors after a clean re install. I thought that it could be caused by two files that were placed in the packages/gmp/64bit directory that I had not...
Forum: Linux 2021-10-30, 13:28
Replies: 30
Views: 5,224
Posted By MJansen
Quick reply. thanks for that! Reminds...

Quick reply. thanks for that!



Reminds me: somewhere there was a hickup, i.e. makefile asked me for *.h files in the packages/gwnum/ directory instead of the packages/gwnum/64bit/ directory, I...
Forum: Linux 2021-10-30, 11:38
Replies: 30
Views: 5,224
Posted By MJansen
Hi I am looking for some help: I have been...

Hi I am looking for some help:

I have been using Ubuntu for a short while now and am not that advanced a user. I have been trying to get pfgw64 running and I succeeded in getting the source files...
Forum: Prime Gap Searches 2021-10-29, 19:56
Replies: 66
Views: 9,000
Posted By MJansen
Interesting development Craig! Seems really fast...

Interesting development Craig! Seems really fast and you already have found so many gaps with merit over 30, in such a short period of time, so interesting indeed!

Do you see this also practically...
Forum: Prime Gap Searches 2021-10-20, 11:13
Replies: 48
Views: 4,911
Posted By MJansen
Hi Henryzz, I saw that there are some...

Hi Henryzz,

I saw that there are some samples with the mpz_class but have so far only used the mpz_t datatype after mixing up different types in the wrong places ;-) Thanks for the tip!

Kind...
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