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Search: Posts Made By: chris2be8
Forum: NFS@Home 2020-09-28, 15:54
Replies: 16
Views: 730
Posted By chris2be8
f38_158p1 has built a matrix. About 57 hours...

f38_158p1 has built a matrix. About 57 hours remain so I should have a result on Thursday.

Chris
Forum: Math 2020-09-26, 15:46
Replies: 8
Views: 783
Posted By chris2be8
Would it work for GFNs, b^2^n+1 where b is an...

Would it work for GFNs, b^2^n+1 where b is an arbitrary base? There are enough possible GFNs that there should be some interesting cases small enough to test in a reasonable time.

Chris
Forum: NFS@Home 2020-09-25, 18:46
Replies: 14
Views: 693
Posted By chris2be8
Hello, Please extend f38_158p1 sieving range...

Hello,

Please extend f38_158p1 sieving range to 130M. I miscalculated how far I would need to sieve and it's not going to get enough relations by 110M.

Chris
Forum: NFS@Home 2020-09-25, 15:52
Replies: 14
Views: 693
Posted By chris2be8
QUEUED AS f45_151p1 (45^151+1)/46 from the...

QUEUED AS f45_151p1

(45^151+1)/46 from the Brent tables:

# Built Thu Sep 24 19:25:29 2020
# Estimated SNFS difficulty 250, GNFS equivalent 180, GNFS difficulty 248, degree 6
n:...
Forum: Hardware 2020-09-24, 15:30
Replies: 36
Views: 1,807
Posted By chris2be8
The prompt with a # should mean it's running as...

The prompt with a # should mean it's running as root. Try id before and after sudo su to confirm that.

The authentication failure from su is probably because the system would want root's password...
Forum: NFS@Home 2020-09-22, 15:55
Replies: 14
Views: 693
Posted By chris2be8
(45^151-1)/630788854724946116735362931053539250547...

(45^151-1)/63078885472494611673536293105353925054750194716086374535711136045644 from the Brent tables:

# Built Mon Sep 21 08:22:11 2020
# Estimated SNFS difficulty 250, GNFS equivalent 180, GNFS...
Forum: NFS@Home 2020-09-22, 15:45
Replies: 467
Views: 30,016
Posted By chris2be8
f33_164p1 is done: p60 factor:...

f33_164p1 is done:

p60 factor: 138213871256738395676655491591099308787223728615572092566737
p60 factor: 440060081822445484822799154677276221880207573449714920591289
p69 factor:...
Forum: NFS@Home 2020-09-16, 16:13
Replies: 467
Views: 30,016
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: 207
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: 272
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: 600
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: 14
Views: 693
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: 219
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: 467
Views: 30,016
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: 467
Views: 30,016
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: 272
Views: 16,130
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: 36
Views: 1,807
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: 719
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: 1,470
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: 102,235
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: 1,470
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: 467
Views: 30,016
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: 467
Views: 30,016
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: 272
Views: 16,130
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: 7,003
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...
Showing results 1 to 25 of 1000

 
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