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Search: Posts Made By: chris2be8
Forum: NFS@Home 2020-09-16, 16:13
Replies: 459
Views: 29,062
Posted By chris2be8
f24_181p1 is factored: p66 factor:...

f24_181p1 is factored:

p66 factor: 181917286624175232138400200142698122799103113613224386935244822531
p150 factor:...
Forum: Msieve 2020-09-16, 15:58
Replies: 7
Views: 180
Posted By chris2be8
I've got one system with a GPU in it where I...

I've got one system with a GPU in it where I don't use the GPU for screen output (it doesn't have the right sort of connector for the KVM switch I use). I had to update settings in the BIOS to make...
Forum: Factoring 2020-09-16, 15:51
Replies: 7
Views: 250
Posted By chris2be8
The Pollard Rho method is described in detail in...

The Pollard Rho method is described in detail in The Art of Computer Programming volume 2 by Knuth. Pages 384-386 in the third edition. That should tell you nearly everything you would want to know...
Forum: Information & Answers 2020-09-15, 15:26
Replies: 9
Views: 555
Posted By chris2be8
2^2197+1 is much too big to factor with yafu on a...

2^2197+1 is much too big to factor with yafu on a single computer. It would need a large supercomputer to do in a reasonable time such as a few years.

The first step for 2^n+1 or 2^n-1 is to look...
Forum: NFS@Home 2020-09-14, 15:53
Replies: 7
Views: 435
Posted By chris2be8
QUEUED AS f38_158p1 ...

QUEUED AS f38_158p1

(38^158+1)/2275019624642515721256024045199705 from the Brent tables:

# Built Sun Sep 13 08:46:36 2020
# Estimated SNFS difficulty 250, GNFS equivalent 182, GNFS difficulty...
Forum: PrimeNet 2020-09-13, 15:26
Replies: 6
Views: 191
Posted By chris2be8
In those 4 cases the factors were found years ago...

In those 4 cases the factors were found years ago and the assignments are recent. So they must be PRP-CF assignmenst to check if the cofactor is prime.

The only bad case is if a factor is found...
Forum: NFS@Home 2020-09-10, 15:50
Replies: 459
Views: 29,062
Posted By chris2be8
f24_181p1 has built a matrix. About 124 hours...

f24_181p1 has built a matrix. About 124 hours remain so I should have a result by Wednesday.

Chris
Forum: NFS@Home 2020-09-05, 16:06
Replies: 459
Views: 29,062
Posted By chris2be8
f18_199p1 is factored: p106 factor:...

f18_199p1 is factored:

p106 factor: 2446278381926599297217428815885775231020015436291653281177867345355571559649520220452024496501764179929579
p117 factor:...
Forum: NFS@Home 2020-09-05, 16:04
Replies: 270
Views: 15,796
Posted By chris2be8
f18_199p1 is factored. Can I have a pastebin link...

f18_199p1 is factored. Can I have a pastebin link please.

Chros
Forum: Hardware 2020-09-05, 15:31
Replies: 29
Views: 1,505
Posted By chris2be8
Why not stand the system on blocks to increase...

Why not stand the system on blocks to increase the clearance (I've done that with one of my systems)? Or can you replace the feet on the case with something taller to get the same effect?

Chris
Forum: Msieve 2020-09-04, 15:47
Replies: 18
Views: 663
Posted By chris2be8
Try make all NO_ZLIB=1 to build it without ECM....

Try make all NO_ZLIB=1 to build it without ECM. All that means is that msieve won't run ECM against the number you are working on. yafu will still be able to run ECM before it calls msieve.

Chris
Forum: NFS@Home 2020-09-03, 16:17
Replies: 55
Views: 1,379
Posted By chris2be8
That job is pushing the limits of a 31 bit job on...

That job is pushing the limits of a 31 bit job on 14e. I was considering making it a 32 bit job, but then downloading the relations could easily take me nearly as long as solving the matrix.

I'll...
Forum: NFS@Home 2020-09-02, 16:33
Replies: 2,466
Views: 101,813
Posted By chris2be8
QUEUED AS f33_164p1 ...

QUEUED AS f33_164p1

(33^164+1)/18913461626963564690631702326880256391129490662147282184609922 from the Brent tables:

# Built Tue Sep 1 19:20:15 2020
# Estimated SNFS difficulty 250, GNFS...
Forum: NFS@Home 2020-09-01, 16:03
Replies: 55
Views: 1,379
Posted By chris2be8
Another option would be to change lasieved to run...

Another option would be to change lasieved to run 14e with -j 14. That should still use less memory than 15e but have a higher yield than 14e does now. But I don't know exactly how much more memory...
Forum: NFS@Home 2020-08-30, 15:43
Replies: 459
Views: 29,062
Posted By chris2be8
f18_199p1 has built a matrix. About 130 hours...

f18_199p1 has built a matrix. About 130 hours remain so I should have a result on Saturday.

Chris
Forum: NFS@Home 2020-08-28, 16:28
Replies: 459
Views: 29,062
Posted By chris2be8
f78_131m1 is factored: p78 factor:...

f78_131m1 is factored:

p78 factor: 103602912511803521419560624000768917463551070080350767473292351655659495234359
p123 factor:...
Forum: NFS@Home 2020-08-28, 16:26
Replies: 270
Views: 15,796
Posted By chris2be8
f78_131m1.log

Hello,

I still can't get pastebin to work (I've just tried disabling my browser's cache but still no luck). So could I have a link please.

Chris
Forum: Information & Answers 2020-08-25, 16:04
Replies: 38
Views: 6,837
Posted By chris2be8
Here's another proof: There are infinitely...

Here's another proof:

There are infinitely many primes of form 3n+2, none of which are Mersenne primes.


Lemma 1: No Mersenne numbers are of form 3n+2.

2^n is never divisible by 3 so 2^n...
Forum: NFS@Home 2020-08-24, 16:16
Replies: 459
Views: 29,062
Posted By chris2be8
f66_136p1 is done: p49 factor:...

f66_136p1 is done:

p49 factor: 1496353327940500893523924732750393935268398858097
p179 factor:...
Forum: NFS@Home 2020-08-24, 16:11
Replies: 270
Views: 15,796
Posted By chris2be8
f66_136p1 factored.

Hello,

Could I have a pastebin link please?

Chris
Forum: NFS@Home 2020-08-24, 16:02
Replies: 2,466
Views: 101,813
Posted By chris2be8
QUEUED AS f24_181p1 ...

QUEUED AS f24_181p1

(24^181+1)/92771194202961537495813723567221525 from the Brent tables:

# Built Sun Aug 23 19:23:29 2020
# Estimated SNFS difficulty 250, GNFS equivalent 180, GNFS difficulty...
Forum: GPU Computing 2020-08-24, 15:38
Replies: 3,320
Views: 283,246
Posted By chris2be8
I think the key is that mfaktc.ini and...

I think the key is that mfaktc.ini and worktodo.txt have to be in the folder where you run the command. Which does not have to be the same place as the command itself.

So if you want to use a...
Forum: Aliquot Sequences 2020-08-21, 16:01
Replies: 591
Views: 25,667
Posted By chris2be8
Factordb itself factors everything below 70...

Factordb itself factors everything below 70 digits. At present I'm factoring the range from 70 to 80 digits. So I've probably contributed to several sequences.

But there's been a lot of what looks...
Forum: NFS@Home 2020-08-18, 20:41
Replies: 459
Views: 29,062
Posted By chris2be8
f66_136p1 has built a matrix (TD 110, 120...

f66_136p1 has built a matrix (TD 110, 120 failed). About 132 hours remain so I should have a result on Monday 24.

The download took longer than I expected, bad weather caused my internet...
Forum: NFS@Home 2020-08-14, 18:33
Replies: 2,466
Views: 101,813
Posted By chris2be8
QUEUED AS f18_199p1 ...

QUEUED AS f18_199p1

(18^199+1)/7848237702564958568279539139 from the Brent tables:

# Built Thu Aug 13 20:23:21 2020
# Estimated SNFS difficulty 250, GNFS equivalent 180, GNFS difficulty 222,...
Showing results 1 to 25 of 1000

 
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