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Search: Posts Made By: chris2be8
Forum: Software 2020-12-05, 16:40
Replies: 7
Views: 149
Posted By chris2be8
Exactly which version of mprime are you running?...

Exactly which version of mprime are you running? Where did you get it from? And output from uname -a and cat /etc/os-release to say what Linux distro and level you have might also be useful.

Chris
Forum: NFS@Home 2020-12-04, 17:16
Replies: 98
Views: 4,662
Posted By chris2be8
f28_173p1 has built a matrix. About 92 hours...

f28_173p1 has built a matrix. About 92 hours remain so I should have a result on Tuesday.

Chris
Forum: NFS@Home 2020-12-02, 16:51
Replies: 62
Views: 3,645
Posted By chris2be8
QUEUED AS f73_134p1 ...

QUEUED AS f73_134p1

(73^134+1)/428446932853227582970 from the Brent tables:

# Built Tue Dec 1 17:12:09 2020
# Estimated SNFS difficulty 250, GNFS equivalent 183, GNFS difficulty 230, degree 6...
Forum: FactorDB 2020-11-29, 16:52
Replies: 427
Views: 42,961
Posted By chris2be8
I've noticed an interesting set of PRPs in...

I've noticed an interesting set of PRPs in factordb (all 1000 digits):

1100000001977145547 10^999+12142617231
1100000001977145688 (10^999+12142617231)*2-1
1100000001977145775...
Forum: Aliquot Sequences 2020-11-27, 16:48
Replies: 125
Views: 18,673
Posted By chris2be8
The first line of the .poly posted above is...

The first line of the .poly posted above is incomplete, it ends 636955526325> which would probably upset cownoise.

Replacing that with the number in post 102 I get:

chris@rigel:~/bin$ vi t.poly...
Forum: NFS@Home 2020-11-26, 16:44
Replies: 62
Views: 3,645
Posted By chris2be8
QUEUED AS f67_137m1 ...

QUEUED AS f67_137m1

(67^137-1)/21407500575240997528059313818 from the Brent tables.

# Built Wed Nov 25 17:26:20 2020
# Estimated SNFS difficulty 252, GNFS equivalent 182, GNFS difficulty 222,...
Forum: NFS@Home 2020-11-25, 20:54
Replies: 98
Views: 4,662
Posted By chris2be8
f20_193p1 is done: p123 factor:...

f20_193p1 is done:

p123 factor: 743395129164316869525665577319693817035097284345238034426961878946172470558944727352947390616022972186685505892718904201101
p127 factor:...
Forum: FactorDB 2020-11-25, 16:49
Replies: 427
Views: 42,961
Posted By chris2be8
Second run finished: Stopping at 3011 digits...

Second run finished:

Stopping at 3011 digits number 3 (2874 proved prime (tried to factor 11564 N-1's, 0 new factors added, 187 fully factored))


Most of the successes were of the form...
Forum: NFS@Home 2020-11-23, 16:55
Replies: 98
Views: 4,662
Posted By chris2be8
f20_193p1 has built a matrix. About 49 hours...

f20_193p1 has built a matrix. About 49 hours remain so I should have a result on Wednesday or Thursday depending on how many square root steps it takes.

Chris
Forum: Factoring 2020-11-23, 16:44
Replies: 9
Views: 449
Posted By chris2be8
I think it might mean that if a number has...

I think it might mean that if a number has several prime factors stage 1 might find a composite factor, the product of more that 1 prime factor. But stage 2 would not find a composte factor.

But...
Forum: FactorDB 2020-11-22, 16:43
Replies: 427
Views: 42,961
Posted By chris2be8
And the script has finished: Stopping at...

And the script has finished:

Stopping at 3010 digits number 4 (5347 proved prime (tried to factor 12735 N-1's, 1 new factor added, 427 fully factored))


Although there were very few matching...
Forum: NFS@Home 2020-11-21, 18:19
Replies: 98
Views: 4,662
Posted By chris2be8
f91_127m1 is done: p54 factor:...

f91_127m1 is done:

p54 factor: 630945082975691656959512602591389470959316859699955789
p147 factor:...
Forum: FactorDB 2020-11-21, 16:56
Replies: 54
Views: 3,898
Posted By chris2be8
That would reduce the number of page requests per...

That would reduce the number of page requests per hour, but increase the risk of a collision. I'd only recommend it working well below 70 digits, in a range no one else is working on. And keep the...
Forum: NFS@Home 2020-11-21, 16:44
Replies: 62
Views: 3,645
Posted By chris2be8
QUEUED AS f48_149p1 ...

QUEUED AS f48_149p1

(48^149+1)/79982198475611344580308711 from the Brent tables.

# Built Fri Nov 20 17:23:16 2020
# Estimated SNFS difficulty 251, GNFS equivalent 180, GNFS difficulty 225,...
Forum: FactorDB 2020-11-20, 17:04
Replies: 54
Views: 3,898
Posted By chris2be8
There have been a load of a few thousand digit...

There have been a load of a few thousand digit numbers added to factordb recently. When factordb tries to factor them it runs ECM, which often finds a composite factor which is the product of most of...
Forum: FactorDB 2020-11-20, 16:56
Replies: 427
Views: 42,961
Posted By chris2be8
Hello, There are now over 121000 PRPs under...

Hello,

There are now over 121000 PRPs under 3000 digits in factordb. I'm running a script to prove simple cases prime by N-1 if N-1 has algebraic factors (it handles (b^p-1)/(b-1) and...
Forum: NFS@Home 2020-11-19, 16:54
Replies: 98
Views: 4,662
Posted By chris2be8
f91_127m1 has built a matrix. About 47 hours...

f91_127m1 has built a matrix. About 47 hours remain so I should have a result on Saturday.

Chris
Forum: FactorDB 2020-11-18, 17:17
Replies: 54
Views: 3,898
Posted By chris2be8
To judge by the bits of html factordb is sending...

To judge by the bits of html factordb is sending a web page instead of a number to factor. Which might well be saying you have reached a limit on how much you can do in an hour. The limits are by IP...
Forum: FactorDB 2020-11-17, 17:22
Replies: 54
Views: 3,898
Posted By chris2be8
If you have GP installed try something like: ...

If you have GP installed try something like:

echo 'factor($n,10^5)' | gp -f -q


That TFs a number up to 10^5 which is a much better way to split off small factors than running ECM.

Chris
Forum: FactorDB 2020-11-17, 17:18
Replies: 54
Views: 3,898
Posted By chris2be8
No, I've stopped that (there don't seem to be any...

No, I've stopped that (there don't seem to be any left in this range).

Looking at a few in the 70+ digit range most of them seem to be from factordb running ECM against a large number and finding...
Forum: NFS@Home 2020-11-17, 16:54
Replies: 62
Views: 3,645
Posted By chris2be8
QUEUED AS f28_173p1 ...

QUEUED AS f28_173p1

(28^173+1)/302830318008957566210407099069397706796228194779381147147934606233178157091 from the Brent tables.

# Built Mon Nov 16 17:44:22 2020
# Estimated SNFS difficulty...
Forum: FactorDB 2020-11-16, 17:03
Replies: 54
Views: 3,898
Posted By chris2be8
I've started running a script to add algebraic...

I've started running a script to add algebraic factors where they exist to factordb. I'm currently working from 88 to 90 digits. Which should thin down the junk a bit.

But this is getting rather...
Forum: FermatSearch 2020-11-12, 17:27
Replies: 58
Views: 3,057
Posted By chris2be8
Just use whatever search engine is available in...

Just use whatever search engine is available in China. Or move to a civilised country.

Chris
Forum: Math 2020-11-10, 16:46
Replies: 6
Views: 174
Posted By chris2be8
A better way to do it is to generate several...

A better way to do it is to generate several public/private key pairs, each independently generated from random noise. Then encrypt the private keys with a symmetric key generated from a secure...
Forum: NFS@Home 2020-11-08, 16:43
Replies: 62
Views: 3,645
Posted By chris2be8
QUEUED AS f20_193p1 (20^193+1)/21 from the...

QUEUED AS f20_193p1

(20^193+1)/21 from the Brent tables:

# Built Sat Nov 7 16:58:32 2020
# Estimated SNFS difficulty 252, GNFS equivalent 181, GNFS difficulty 250, degree 6
n:...
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