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Forum: And now for something completely different 2022-05-23, 21:23
Replies: 128
Views: 32,749
Posted By ryanp
Oops, OK. Anyone working on the other two?

Oops, OK. Anyone working on the other two?
Forum: And now for something completely different 2022-05-23, 20:38
Replies: 128
Views: 32,749
Posted By ryanp
I'd also like to take the next 3 Mersenne PRP...

I'd also like to take the next 3 Mersenne PRP cofactors here (https://www.mersenne.ca/prp.php?min=50000&max=120000): M86137, M86371, and M87691.
Forum: sweety439 2022-05-23, 18:11
Replies: 35
Views: 1,740
Posted By ryanp
I did one of these as a warmup for testing out cm...

I did one of these as a warmup for testing out cm 0.4.1-dev with Paul Underwood's gw_prp hack enhancement. You should work on the others yourself.
Forum: Software 2022-05-23, 17:16
Replies: 634
Views: 102,072
Posted By ryanp
I've been able to repro this on multiple...

I've been able to repro this on multiple machines. Observations:

* it fails consistently and only with -s "39*2^n+1"
* it fails with even -W 4, though this produces:

518400 bytes used for...
Forum: And now for something completely different 2022-05-23, 15:47
Replies: 128
Views: 32,749
Posted By ryanp
Reserving W117239...

Reserving W117239 (http://factordb.com/index.php?id=1100000000017751314).
Forum: Software 2022-05-23, 13:30
Replies: 634
Views: 102,072
Posted By ryanp
Found what seems to be a bug in the latest SVN...

Found what seems to be a bug in the latest SVN code. I have not had time to recompile or test with gdb.

$ ./srsieve2 -P 1e14 -W 64 -s "39*2^n+1" -o ferm39_10M_20M_sv1e14.txt -n 10e6 -N 20e6...
Forum: And now for something completely different 2022-05-23, 12:53
Replies: 128
Views: 32,749
Posted By ryanp
I don't see Andreas' ecpp software listed there....

I don't see Andreas' ecpp software listed there. I attempted to create a new proof code using the existing FastECPP, but am not sure how to upload the prime + cert (just attempting to submit...
Forum: And now for something completely different 2022-05-23, 12:04
Replies: 128
Views: 32,749
Posted By ryanp
Yes, I had reserved this one a while back, then...

Yes, I had reserved this one a while back, then promptly forgot about it (beyond what I could do with Primo on a single machine).
Forum: And now for something completely different 2022-05-23, 11:01
Replies: 116
Views: 5,355
Posted By ryanp
This is quite useful. Thank you! Could your...

This is quite useful. Thank you!

Could your call to mpz_probab_prime_p() in the if block be replaced by mpz_millerrabin as R. Gerbicz suggested?



Perhaps this could be supported by some sort...
Forum: And now for something completely different 2022-05-23, 10:33
Replies: 128
Views: 32,749
Posted By ryanp
I only noticed this thread recently. I was just...

I only noticed this thread recently. I was just working on M78737 cofactor and just uploaded (http://factordb.com/certoverview.php?pending=true) the cert. Hopefully no one else burned cycles on...
Forum: And now for something completely different 2022-05-17, 21:50
Replies: 116
Views: 5,355
Posted By ryanp
How sensitive is ecpp-mpi to latency between...

How sensitive is ecpp-mpi to latency between physical hosts?

For example, how much performance degradation would there be if some hosts are 20-30ms from the node on which mpirun ecpp-mpi ... is...
Forum: And now for something completely different 2022-05-17, 19:50
Replies: 256
Views: 54,218
Posted By ryanp
Yep, hoping to find the first CK megaprime. ...

Yep, hoping to find the first CK megaprime.


Approximately 16K tests.
Forum: And now for something completely different 2022-05-17, 18:35
Replies: 256
Views: 54,218
Posted By ryanp
A few more for the wiki: ...

A few more for the wiki:

https://primes.utm.edu/primes/page.php?id=133928
https://primes.utm.edu/primes/page.php?id=133929
https://primes.utm.edu/primes/page.php?id=133930
Forum: And now for something completely different 2022-05-16, 20:18
Replies: 332
Views: 62,879
Posted By ryanp
Think I'm already good, but thanks!

Think I'm already good, but thanks!
Forum: Aliquot Sequences 2022-05-16, 11:21
Replies: 486
Views: 73,430
Posted By ryanp
Releasing the sequence back at i1720. I've done...

Releasing the sequence back at i1720. I've done 80K ECM curves on the c193 at B1=26e7.
Forum: Aliquot Sequences 2022-05-14, 22:00
Replies: 486
Views: 73,430
Posted By ryanp
I'm pushing it a bit further...

I'm pushing it a bit further...
Forum: And now for something completely different 2022-05-14, 16:12
Replies: 332
Views: 62,879
Posted By ryanp
Found a hit: (10^334568-1)^2-2...

Found a hit: (10^334568-1)^2-2 (https://primes.utm.edu/primes/page.php?id=133928).
Forum: And now for something completely different 2022-05-13, 22:29
Replies: 332
Views: 62,879
Posted By ryanp
I'd like to take base 10 starting at 250K. Not...

I'd like to take base 10 starting at 250K. Not sure how high I'll go, maybe to 500K.
Forum: Puzzles 2022-05-02, 17:12
Replies: 9
Views: 767
Posted By ryanp
Also feels too simple... my dumb (recursive)...

Also feels too simple... my dumb (recursive) Python program is about 15 lines and produces a solution for the first part in a few milliseconds, the second one in 3 seconds.
Forum: Lounge 2022-04-24, 17:29
Replies: 1,928
RIP
Views: 218,678
Posted By ryanp
My deepest condolences as well.

My deepest condolences as well.
Forum: XYYXF Project 2022-04-14, 14:00
Replies: 16
Views: 1,647
Posted By ryanp
2 hits so far: ...

2 hits so far:

http://factordb.com/index.php?id=1000000000044714162
http://factordb.com/index.php?id=1000000000044736161
Forum: XYYXF Project 2022-04-12, 16:43
Replies: 16
Views: 1,647
Posted By ryanp
Do you have a link to these 323 composites? I can...

Do you have a link to these 323 composites? I can hit them with some ECM at B1=26e7 or perhaps 85e7.
Forum: FactorDB 2022-04-08, 21:04
Replies: 545
Views: 101,320
Posted By ryanp
factordb.com seems like a very valuable resource...

factordb.com seems like a very valuable resource for the mathematical community. Is there anything we on the forum can do to support Markus? (Pooling money for server upgrades? Helping with coding/DB...
Forum: Factoring 2022-03-30, 22:29
Replies: 1,015
Views: 135,460
Posted By ryanp
I have now run 4200 curves on this c191 at...

I have now run 4200 curves on this c191 at B1=26e7, and will most likely continue running them for another day or two.
Forum: Factoring 2022-03-30, 19:43
Replies: 1,015
Views: 135,460
Posted By ryanp
There were 2 smallish factors that appeared to be...

There were 2 smallish factors that appeared to be missing from factordb. It's down to a c191 now.
Showing results 1 to 25 of 383

 
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