2^9092392+40291 is a probable prime! - Page 7

Jeff Gilchrist · 2011-02-25, 01:12

My last two finished:

Code:

67
SSE2 Proth FFT: size=(1048576,17.342)
Probable_prime_residueis_minus1

71
SSE2 Proth FFT: size=(1048576,17.342)
Probable_prime_residueis_plus1

Since I had 2 extra cores, I did two bonus bases:

Code:

73
SSE2 Proth FFT: size=(1048576,17.342)
Probable_prime_residueis_plus1

79
SSE2 Proth FFT: size=(1048576,17.342)
Probable_prime_residueis_plus1

philmoore · 2011-02-25, 02:10

I have submitted this to the Lifchitz website.

enderak · 2011-02-26, 09:05

Well this stinks - I accidentally closed the wrong cmd window (yup, the one running pfgw) and as far as I can tell it does not save progress anywhere to the hard drive. I don't know if I have it in me to start all over on this. Unless there's some way to restart the N+1 test where it left off, I'm going to abort this job.

Batalov · 2011-02-26, 09:48

Just say no to Windows. It is that easy. :-)

philmoore · 2011-02-26, 16:46

Thanks for your work on this, Justin, but I would say don't bother to restart, the progress was so excruciatingly slow. We now have 22 successful strong prp tests, I may program an N+1 test using gwnum at some point, but I'm pretty sure this one is a prime!

I'm planning a party to celebrate this on May 7th: 5/7/11. Anyone in Eugene, Oregon that day is more than welcome!

Batalov · 2011-02-26, 21:53

Anyfive seven elevennis? Sounds tempting...

paleseptember · 2011-02-27, 23:54

According to Google Maps, it's about 22,000km, and will involve about two month's worth of kayaking. If I leave today I might make it ;)

My students might be a little miffed though!

Jeff Gilchrist · 2011-03-01, 14:22

Quote:

Originally Posted by paleseptember

According to Google Maps, it's about 22,000km, and will involve about two month's worth of kayaking. If I leave today I might make it ;)

My students might be a little miffed though!

Bah, bring them along, field trip!

paleseptember · 2011-03-03, 02:19

Hehehe!

Alright, we're going to be talking predicate logic now (paddle paddle paddle), we should be up to set theory by indonesia (paddle paddle paddle), and I think we can get through most of the section on graphs by the time we hit Japan (paddle paddle paddle.) (Internal note, this would be far easier if I'd remembered to print the notes before we left, and hadn't needed to bring the photocopier!)

Jeff Gilchrist · 2011-03-04, 10:52

It looks like LLR is adding the BPSW test:
http://www.mersenneforum.org/showpos...1&postcount=16

LLR could be used for this right? In the docs it says it is for numbers in the form N = k*b^n +/- 1 but later it also mentions k*b^n+c so

Once that is implemented it could be another PRP check to run on the non-proven exponents.

ATH · 2011-03-05, 16:02

Quote:

2^9092392+40291 is Lucas PRP, Starting Frobenius test sequence
Using zero-padded Core2 type-3 FFT length 960K, Pass1=768, Pass2=1280, Q = 2

2^9092392+40291 is Frobenius PRP! (P = 4, Q = 2, D = 8) Time : 1037541.696 sec.

The Lucas test took around 9.8 days and Frobenius test 2.2 days on 1 core of
Core2Duo (Conroe) E6750 2.66 Ghz.

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2011-02-25, 02:10	#68
philmoore "Phil" Sep 2002 Tracktown, U.S.A. 1121₁₀ Posts	I have submitted this to the Lifchitz website.

2011-02-26, 09:05	#69
enderak Feb 2009 3·13 Posts	Well this stinks - I accidentally closed the wrong cmd window (yup, the one running pfgw) and as far as I can tell it does not save progress anywhere to the hard drive. I don't know if I have it in me to start all over on this. Unless there's some way to restart the N+1 test where it left off, I'm going to abort this job.

2011-02-26, 09:48	#70
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 10011111000011₂ Posts	Just say no to Windows. It is that easy. :-)

2011-02-26, 16:46	#71
philmoore "Phil" Sep 2002 Tracktown, U.S.A. 19·59 Posts	Thanks for your work on this, Justin, but I would say don't bother to restart, the progress was so excruciatingly slow. We now have 22 successful strong prp tests, I may program an N+1 test using gwnum at some point, but I'm pretty sure this one is a prime! I'm planning a party to celebrate this on May 7th: 5/7/11. Anyone in Eugene, Oregon that day is more than welcome!

2011-02-26, 21:53	#72
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3³·13·29 Posts	Anyfive seven elevennis? Sounds tempting...

2011-02-27, 23:54	#73
paleseptember Jun 2008 Wollongong, .au 3×61 Posts	According to Google Maps, it's about 22,000km, and will involve about two month's worth of kayaking. If I leave today I might make it ;) My students might be a little miffed though!

2011-03-03, 02:19	#75
paleseptember Jun 2008 Wollongong, .au 3·61 Posts	Hehehe! Alright, we're going to be talking predicate logic now (paddle paddle paddle), we should be up to set theory by indonesia (paddle paddle paddle), and I think we can get through most of the section on graphs by the time we hit Japan (paddle paddle paddle.) (Internal note, this would be far easier if I'd remembered to print the notes before we left, and hadn't needed to bring the photocopier!)

2011-03-04, 10:52	#76
Jeff Gilchrist Jun 2003 Ottawa, Canada 3×17×23 Posts	It looks like LLR is adding the BPSW test: http://www.mersenneforum.org/showpos...1&postcount=16 LLR could be used for this right? In the docs it says it is for numbers in the form N = kb^n +/- 1 but later it also mentions kb^n+c so Once that is implemented it could be another PRP check to run on the non-proven exponents.