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Forum: Aliquot Sequences 2022-07-06, 15:36
Replies: 599
Views: 96,045
Posted By chris2be8
I'm afraid I've never used aliqueit (with or...

I'm afraid I've never used aliqueit (with or without yafu) so I can't help. Sorry.

bsquared wrote yafu so he might be able to help.
Forum: NFS@Home 2022-06-23, 15:34
Replies: 72
Views: 4,633
Posted By chris2be8
f51_169m1 is done: p102 factor:...

f51_169m1 is done:

p102 factor: 114213756658451379288919972052183125087891155576079838656931993933276416169564079752526147055200489959
p166 factor:...
Forum: Factoring 2022-06-22, 16:21
Replies: 502
Views: 77,449
Posted By chris2be8
Update, I've generated a .poly for 13^288+1 and...

Update, I've generated a .poly for 13^288+1 and msieve rates it's e-score as 4.429e-12 which is only slightly worse that the record for GNFS 152 (5.193e-12). So SNFS might be quicker since it saves...
Forum: Factoring 2022-06-22, 15:37
Replies: 502
Views: 77,449
Posted By chris2be8
13^282+1 is probably easier by GNFS, SNFS 210 is...

13^282+1 is probably easier by GNFS, SNFS 210 is about as hard as GNFS 155, but 13^282+1's cofactor is 147 digits.

13^288+1 is about equal difficulty by SNFS and GNFS. SNFS 214 is about as hard as...
Forum: Aliquot Sequences 2022-06-15, 15:52
Replies: 1,735
Views: 200,670
Posted By chris2be8
My first cut would be: Put all primes into a...

My first cut would be:

Put all primes into a flat file, called primes.txt below.
sort <primes.txt | uniq --repeated >primes.duplicates

That should get a list of all primes that appear more...
Forum: NFS@Home 2022-06-15, 15:43
Replies: 72
Views: 4,633
Posted By chris2be8
f51_169m1 has built a matrix, with...

f51_169m1 has built a matrix, with target_density=130. LA should finish in about 189 hours.

I seem to have underestimated the yield, so it's very oversieved (536,217,998 relations). -nc1 took...
Forum: Factoring 2022-06-09, 16:07
Replies: 68
Views: 1,500
Posted By chris2be8
The man page is shipped with ECM in ecm.1 but...

The man page is shipped with ECM in ecm.1 but it's not in a format that's easy for a human to read. A copy that looks like output from man ecm in plain text would be helpful.
Forum: Factoring 2022-06-09, 15:56
Replies: 68
Views: 1,500
Posted By chris2be8
This sounds like a hardware problem. First try...

This sounds like a hardware problem. First try clearing dust etc out of it and check cooling is OK. Then run memtest86 to check the RAM is OK. Try it both single threaded and multi-threaded (I have...
Forum: Homework Help 2022-06-09, 15:38
Replies: 24
Views: 1,239
Posted By chris2be8
Unless you know at least one of the factors comes...

Unless you know at least one of the factors comes from a fairly short list then trying 65 digit primes one or a few at a time is completely pointless. You would have to try more than 10^60 primes...
Forum: Factoring 2022-06-08, 15:43
Replies: 68
Views: 1,500
Posted By chris2be8
gmp-ecm also provides a man page. From man ecm: ...

gmp-ecm also provides a man page. From man ecm:


Reading the man page as well as the README files should make things easier to understand.
Forum: Msieve 2022-06-07, 16:02
Replies: 4
Views: 280
Posted By chris2be8
Testing diff: chris@rigel:~/bin$ ll msieve ...

Testing diff:

chris@rigel:~/bin$ ll msieve
lrwxrwxrwx 1 chris chris 39 Aug 6 2018 msieve -> /home/chris/msieve-svn1022/trunk/msieve

chris@rigel:~/bin$ diff...
Forum: Msieve 2022-06-06, 15:53
Replies: 4
Views: 280
Posted By chris2be8
I assume diff ../../msieve_nfsathome/msievSR...

I assume diff ../../msieve_nfsathome/msievSR ../../msieve_nfsathome/msieve says the files are the same.

Does the system have ECC memory? If not it's possible the copy loaded into memory was...
Forum: Factoring 2022-06-05, 15:37
Replies: 61
Views: 4,453
Posted By chris2be8
Look at what P-1 bounds have been done before...

Look at what P-1 bounds have been done before starting TF. P-1 is sure to find any factor smaller than B1, and almost sure to find any factor smaller than min(B1^2, B2) (there's only a very rare case...
Forum: Factoring 2022-05-30, 15:47
Replies: 84
Views: 2,796
Posted By chris2be8
Interesting numbers like 2^1277-1 are *much*...

Interesting numbers like 2^1277-1 are *much* harder than the numbers you are proposing as challenges. So it would need a *lot* of coins in the deadpool to make it worth factoring.

A more practical...
Forum: NFS@Home 2022-05-28, 16:34
Replies: 1,928
Views: 183,385
Posted By chris2be8
Is something wrong with escatter11.fullerton.edu?...

Is something wrong with escatter11.fullerton.edu?

$ ping escatter11.fullerton.edu
ping: escatter11.fullerton.edu: Temporary failure in name resolution


I can connect to other sites such as...
Forum: Factoring 2022-05-28, 15:56
Replies: 84
Views: 2,796
Posted By chris2be8
One question that needs to be answered *before*...

One question that needs to be answered *before* you launch the system is what will happen when someone builds a quantum computer that can factor numbers of the relevant size in a few seconds? Will...
Forum: NFS@Home 2022-05-26, 15:44
Replies: 68
Views: 4,727
Posted By chris2be8
QUEUED AS f51_169m1 (51^169-1)/(51^13-1)...

QUEUED AS f51_169m1

(51^169-1)/(51^13-1) from the Brent tables is too big for 15e_small so submitting to 15e:

# Record 1 match 1 from parameters read Sun Feb 27 16:51:23 2022
# SNFS difficulty...
Forum: NFS@Home 2022-05-25, 16:02
Replies: 79
Views: 4,762
Posted By chris2be8
Thanks for the advice. I'll test sieve lims of...

Thanks for the advice. I'll test sieve lims of 200M/200M against 133M/266M and see which gets the best yield. With luck I'll be able to post a job tomorrow.

I wish I knew what all the output from...
Forum: Factoring 2022-05-25, 15:41
Replies: 502
Views: 77,449
Posted By chris2be8
91^145-1 is done: Resuming ECM residue saved...

91^145-1 is done:

Resuming ECM residue saved by chris@4core with GMP-ECM 7.0.5-dev on Wed May 25 02:20:39 2022
Input number is...
Forum: NFS@Home 2022-05-24, 15:56
Replies: 79
Views: 4,762
Posted By chris2be8
I've ECMed (51^169-1)/(51^13-1) to nearly t60, so...

I've ECMed (51^169-1)/(51^13-1) to nearly t60, so it's ready for SNFS. But test sieving suggests it's too big for 15e_small, I could only get a nearly high enough yield with lpb[ar]: 32 and 3 large...
Forum: NFS@Home 2022-05-24, 15:41
Replies: 85
Views: 7,765
Posted By chris2be8
f89_143m1 is done: p64 factor:...

f89_143m1 is done:

p64 factor: 2736586429438315214286471446169937696213281530030300435734314427
p165 factor:...
Forum: Factoring 2022-05-24, 15:36
Replies: 502
Views: 77,449
Posted By chris2be8
No response, so I'll reserve 91^145-1 for ECM,...

No response, so I'll reserve 91^145-1 for ECM, then GNFS if necessary.
Forum: Factoring 2022-05-19, 15:42
Replies: 502
Views: 77,449
Posted By chris2be8
Does anyone know who factored 91^139-1 ? When I...

Does anyone know who factored 91^139-1 ? When I checked the last holes after factoring 19^221-1 I noticed it was factored. The factors were not in factordb (just in http://myfactors.mooo.com/) so I...
Forum: NFS@Home 2022-05-18, 16:00
Replies: 85
Views: 7,765
Posted By chris2be8
f19_221m1 is done: p76 factor:...

f19_221m1 is done:

p76 factor: 3798565872679392977764923872359903722908914263900592144316654818841325041927
p81 factor:...
Forum: Factoring 2022-05-18, 15:54
Replies: 84
Views: 2,796
Posted By chris2be8
Most interesting numbers would have a formula, eg...

Most interesting numbers would have a formula, eg (91^145-1)/90, a lot shorter than the decimal expansion of the number. You could find a lot of such numbers in factordb (even if you only accept...
Showing results 1 to 25 of 1000

 
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