Primo/FastECPP reservation thread

[wpolly]

This thread is made following the suggestion of Paul Underwood in this post, as a place of reserving large PRPs for ECPP testing.


I'll give a first call: I reserve Phi(32481,10) at 21600 digits.

[paulunderwood]

From https://www.mersenneforum.org/showpo...&postcount=310

I am reserving W35851

Done! http://www.factordb.com/index.php?qu...54919454473787

Now doing: http://factordb.com/index.php?id=1100000001336232261 (23,451 digits) Done!

[paulunderwood]

https://www.mersenne.ca/exponent/78737 PRP23654

[sweety439]

Can someone reserve (51^4229-1)/50, (91^4421-1)/90 and 60^4663-59^4663?

[paulunderwood]

Originally Posted by paulunderwood

https://www.mersenne.ca/exponent/78737 PRP23654

I am unreserving this number after a major catastrophic hardware failure -- the machine no longer posts.

It would be interesting to me for someone with a AMD 3990X to download the certificate for my recent 40k Primo proof from ellipsa.eu and run a verification on it. It took 15.5 hours on my now defunct Opteron class 48 cores at 2.2 GHz. A comparison would be very interesting.

[Gelly]

Originally Posted by sweety439

Can someone reserve (51^4229-1)/50, (91^4421-1)/90 and 60^4663-59^4663?

Already finished the first one, should be verified on FactorDB soonish! The other two are spun up on my system and should finish in a day or two. Hope this isn't crass to start work pre-reservation!

[Gelly]

(51^4229-1)/50, (91^4421-1)/90 and 60^4663-59^4663 are all done! FactorDB finished with them and now they are recognized as prime.
http://factordb.com/index.php?id=1100000000651917018
http://factordb.com/index.php?id=1100000000685787852
http://factordb.com/index.php?id=1100000000467236538

After finishing that and presumably finishing my vanity prime test in a couple days, I'd like to reserve P = 3^45535+2 (PRP21726).

[paulunderwood]

Originally Posted by Gelly

After finishing that and presumably finishing my vanity prime test in a couple days, I'd like to reserve P = 3^45535+2 (PRP21726).

Are you using a 32 core system?

[Gelly]

Originally Posted by paulunderwood

Are you using a 32 core system?

Yup! 3970x system, for everyone else on the forums who may be curious.

I finished 3^45535+2 in about 23 days, though there was a power outage, so precise numbers were lost, unfortunately. The certificate, once verified, will be attached here!

I'll reserve 10^25333-2*10^5182-3 (PRP25333) because it looks silly and it'll force myself into 9th on ECPP.

Also...

Originally Posted by paulunderwood

It would be interesting to me for someone with a AMD 3990X to download the certificate for my recent 40k Primo proof from ellipsa.eu and run a verification on it. It took 15.5 hours on my now defunct Opteron class 48 cores at 2.2 GHz. A comparison would be very interesting.

Running it with 3970x, it verified it in 37593s, or a touch less than 10.5 hours. I look forward to seeing results for a 3990x.

[paulunderwood]

Congrats, Gelly, for the certification of 3^45535+2.

You might want to certify some top20 Mersnne co-factors. The available ones are here. If you are interested, I might have a backup of a partially done M78,737

Edit: I can't find a backup.

[ryanp]

Originally Posted by paulunderwood

Congrats, Gelly, for the certification of 3^45535+2.

You might want to certify some top20 Mersnne co-factors. The available ones are here. If you are interested, I might have a backup of a partially done M78,737

Edit: I can't find a backup.

I decided to fire up certification of M78737 with Primo, using 64 processes. Hopefully no one else is already running this!

The machine it's running on is a 3Ghz, 36-core/72-thread system. Anyone have a rough sense of how long this should take?

(Addendum: it would be great if Primo was open-source... I'd love to understand more about these "stk4321" processes it spawns. If I could farm these out to a cluster and then feed the results back in, presumably this could go a lot faster).