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Search: Posts Made By: chris2be8
Forum: Factoring 2022-09-28, 16:11
Replies: 23
Views: 521
Posted By chris2be8
Glad I could help. Let me know if you want any...

Glad I could help. Let me know if you want any bits I left out (eg finding out what files to sort on).

I can't test it myself because most of my PCs are shut down for the duration of the energy...
Forum: Factoring 2022-09-27, 16:26
Replies: 23
Views: 521
Posted By chris2be8
I've managed to make msieve polyselect work quite...

I've managed to make msieve polyselect work quite well, but I've not used CADO at all. I hope my notes help.

For non-GPU work I just run several msieve tasks in parallel, each doing the whole job...
Forum: GMP-ECM 2022-09-22, 15:56
Replies: 25
Views: 1,460
Posted By chris2be8
Was it originally found after running several...

Was it originally found after running several curves, then not found running one curve starting with the sigma reported for the curve that found it? That would suggest an uninitialised variable...
Forum: Aliquot Sequences 2022-09-21, 15:57
Replies: 45
Views: 806
Posted By chris2be8
If the base and exponent are both prime they may...

If the base and exponent are both prime they may well have been done by the Oddperfect project. And some people find p^q-1 interesting.

If the base is composite then index 1 will have algebraic...
Forum: NFS@Home 2022-09-13, 16:01
Replies: 140
Views: 11,897
Posted By chris2be8
You said to sieve from 25M to 100M, with lims of...

You said to sieve from 25M to 100M, with lims of 134M. Sieving from about 100M to 175M should have got enough relations with a lower duplicate rate. (Of course you would have to have test sieved up...
Forum: FactorDB 2022-09-12, 15:50
Replies: 186
Views: 61,391
Posted By chris2be8
Thanks for the advice. I've installed primo-4.3.3...

Thanks for the advice. I've installed primo-4.3.3 on another system so if I hit another number like that I can try to prove with 4.3.3.
Forum: Astronomy 2022-09-10, 16:33
Replies: 15
Views: 896
Posted By chris2be8
I brought it from WHSmith.

I brought it from WHSmith.
Forum: FactorDB 2022-09-10, 16:26
Replies: 186
Views: 61,391
Posted By chris2be8
The input file is as downloaded from factordb....

The input file is as downloaded from factordb. And I've just checked several other .in files where I was able to build a certificate, they all say N$=
Forum: NFS@Home 2022-09-10, 16:00
Replies: 130
Views: 8,169
Posted By chris2be8
Most of what I know about lambda is from reading...

Most of what I know about lambda is from reading the INSTALL.and.USE (or cweb.INSTALL.and.USE) file shipped with the lattice siever. Read the paragraph after the example poly a few times and it...
Forum: Astronomy 2022-09-09, 16:28
Replies: 15
Views: 896
Posted By chris2be8
Were you inspired by the August issue of...

Were you inspired by the August issue of Astronomy?
Forum: FactorDB 2022-09-09, 16:23
Replies: 186
Views: 61,391
Posted By chris2be8
I tried to build a certificate for...

I tried to build a certificate for (77123620275709493545683810076571903+325!)/145997311544641 with the following .in file:

;This is an input file for PRIMO
;Number expressed to the base 16
;The...
Forum: FactorDB 2022-09-04, 15:52
Replies: 2
Views: 304
Posted By chris2be8
I started having problems at about 21:05 BST...

I started having problems at about 21:05 BST yesterday, it said "You have reached the maximum of 4 parallel processing requests. Please wait a few seconds and try again." for every request until...
Forum: NFS@Home 2022-09-04, 15:38
Replies: 140
Views: 11,897
Posted By chris2be8
What makes it so big? If it's lots of "error -nn...

What makes it so big? If it's lots of "error -nn reading relation nnnn" messages then the following script will summarise them:


#!/usr/bin/perl

# This summarises msieve.log ready to post.
...
Forum: Forum Feedback 2022-09-02, 16:53
Replies: 10
Views: 895
Posted By chris2be8
What time zone are you in? I could connect...

What time zone are you in? I could connect yesterday, about 23 hours before making this post.

Did you try to investigate? I'd start with ping mersenneforum.org and if that worked OK try wget...
Forum: YAFU 2022-08-28, 15:32
Replies: 438
Views: 61,093
Posted By chris2be8
(8^85-2)/6 simplifies to (2^254-1)/3 which...

(8^85-2)/6 simplifies to (2^254-1)/3 which factors to (2^127-1)*(2^127+1)/3.

The problem was probably caused by the fact the expression had algebraic factors.
Forum: Aliquot Sequences 2022-08-26, 16:03
Replies: 644
Views: 99,715
Posted By chris2be8
The cannot open input file 'worktodo.ini' message...

The cannot open input file 'worktodo.ini' message is probably coming from msieve.

Part of the output from msieve -h (on Linux):

-i <name> read one or more integers to factor from
...
Forum: YAFU 2022-08-19, 15:43
Replies: 438
Views: 61,093
Posted By chris2be8
Your best option is probably to call yafu as...

Your best option is probably to call yafu as system("./yafu \"factor($composite)\" -threads $yafuthreads -logfile yafu.log");, then parse yafu.log to find the factors once it has finished. Then...
Forum: YAFU 2022-08-18, 15:42
Replies: 438
Views: 61,093
Posted By chris2be8
From ali.pl.txt: open(YAFU, "./yafu...

From ali.pl.txt:

open(YAFU, "./yafu \"factor($composite)\" -threads $yafuthreads|") or die "Couldn't start yafu!";
while (<YAFU>) {
print "$_";


AFAIK output from yafu get's...
Forum: PrimeNet 2022-08-16, 15:29
Replies: 8
Views: 582
Posted By chris2be8
My first thought would be to log on to each of...

My first thought would be to log on to each of them in turn and ping the GIMPS server. That would tell you if their connection to the internet was OK, they could do DNS lookups, etc.

A faulty...
Forum: YAFU 2022-08-10, 15:59
Replies: 438
Views: 61,093
Posted By chris2be8
To recover data from a damaged .gz file try...

To recover data from a damaged .gz file try gzrecover. My script to recover from rubbish in relations from NFS@Home uses:

gzrecover -p $GZ | remdups 1250 -v >$DAT


$GZ is file to process....
Forum: And now for something completely different 2022-08-10, 15:34
Replies: 175
Views: 40,084
Posted By chris2be8
See...

See https://mersenneforum.org/showthread.php?p=611140#post611140 posts 446 and 447. You may need to re-submit any certificates submitted in the last two days.
Forum: FactorDB 2022-08-10, 15:33
Replies: 448
Views: 87,571
Posted By chris2be8
Markus has replied to an email I sent, there was...

Markus has replied to an email I sent, there was a bug in certificate processing. It's now fixed, but certificates submitted since Monday 8 August will need to be re-submitted.

So I've re-started...
Forum: FactorDB 2022-08-09, 15:51
Replies: 448
Views: 87,571
Posted By chris2be8
factordb seems to have stopped accepting new...

factordb seems to have stopped accepting new primo certificates. If I submit a certificate the response says "Saved certificate for processing.." but when I look at the number it still shows as PRP...
Forum: Msieve 2022-08-09, 15:38
Replies: 1
Views: 180
Posted By chris2be8
Run msieve -h (or ./msieve -h in the directory it...

Run msieve -h (or ./msieve -h in the directory it is in). The first line of output should look something like this:

Msieve v. 1.54 (SVN 1022)


Or just look at output from running msieve. It...
Forum: Msieve 2022-08-07, 15:33
Replies: 105
Views: 4,335
Posted By chris2be8
That's not a problem. From the makefile: ...

That's not a problem. From the makefile:

SVN_VERSION := $(shell svnversion .)
ifeq ($(SVN_VERSION),)
SVN_VERSION := unknown
endif


If you did a svn checkout to fetch msieve that would set...
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