Reserved for MF - Sequence 4788 - Page 85

Andi47 · 2010-07-13, 10:16

Quote:

Originally Posted by frmky

ecm took care of it much more quickly

Step 2544 is a c169 (as it was today in the morning). Let's keep fingers crossed that ECM will do the job.

firejuggler · 2010-07-13, 16:24

worst case is a P85*P85... but i hope for a p59*p59*p60 or something around that.. or even a 4 way 40

10metreh · 2010-07-13, 17:17

Quote:

Originally Posted by firejuggler

worst case is a P85*P85... but i hope for a p59*p59*p60 or something around that.. or even a 4 way 40

We'd rather have a p40 * p129. That sorts it out more quickly.

axn · 2010-07-13, 17:30

@firejuggler: The factordb shows that you've done 1200 curves of P-1 and 560 curves of P+1. Say it ain't so!

10metreh · 2010-07-13, 17:35

To clarify axn's post: it is pointless to run P-1 more than once - it ~~will~~ should return the same result every time, finding a factor if there is one within the bounds. P+1 will find a factor (if it is within the bounds) about 1/2 of the time, so running it 3 times (which is normal) gives a ~7/8 chance of finding a factor if there is one within the bounds.

To clarify this further: "within the bounds" means that in the prime factorization of P-1 (for P-1) or P+1 (for P+1), the second-largest prime factor is below the B1 bound and the largest is below the B2 bound.

firejuggler · 2010-07-13, 17:42

axn, unfortunatly I did.... but not that much, i clicked 3 time for p-1 and twice for p+1...
my mouse is sometime disfonctional
I will go to sleep less stupid tonight..

frmky · 2010-07-13, 18:30

I've run 690 curves at B1=26e7. This represents a bit over 2*t45 but a bit less than 0.5*t50, so any factor will most likely be larger than 45 digits.

Andi47 · 2010-07-13, 19:09

Quote:

Originally Posted by frmky

I've run 690 curves at B1=26e7. This represents a bit over 2*t45 but a bit less than 0.5*t50, so any factor will most likely be larger than 45 digits.

I have done ~1000 curves at B1=3e6, no factor. Switching to 44e6 now.

P.S.: According to our last c169, I think that we need ~17000@11e7 before switching to GNFS.

Batalov · 2010-07-13, 19:18

Quote:

Originally Posted by FactorEyes

Anything above C165 is not likely now - I was surprised we pulled that C171 and C169 in such quick succession.

O'Reilly?

Raman · 2010-07-14, 06:46

Quote:

Originally Posted by 10metreh

Sequence 314718 has passed line 9000!

This is the first sequence to hit up with iteration (index) number 9000
Let us continue with that until it acquires a driver

What are the chances of it to acquire a downdriver at this point
at 171 digits
with a factorization such as
8 times some prime of form 1 (mod 4)?

Andi47 · 2010-07-14, 06:54

Quote:

Originally Posted by Andi47

I have done ~1000 curves at B1=3e6, no factor. Switching to 44e6 now.

68@44e6, no factor. I will stop for now due to summer heat.

2010-07-13, 16:24	#926
firejuggler Apr 2010 Over the rainbow 2×1,303 Posts	worst case is a P85P85... but i hope for a p59p59p60 or something around that.. or even a 4 way 40 Last fiddled with by firejuggler on 2010-07-13 at 16:26*

2010-07-13, 17:35	#929
10metreh Nov 2008 2·3³·43 Posts	To clarify axn's post: it is pointless to run P-1 more than once - it ~~will~~ should return the same result every time, finding a factor if there is one within the bounds. P+1 will find a factor (if it is within the bounds) about 1/2 of the time, so running it 3 times (which is normal) gives a ~7/8 chance of finding a factor if there is one within the bounds. To clarify this further: "within the bounds" means that in the prime factorization of P-1 (for P-1) or P+1 (for P+1), the second-largest prime factor is below the B1 bound and the largest is below the B2 bound. Last fiddled with by 10metreh on 2010-07-13 at 17:35

2010-07-13, 17:42	#930
firejuggler Apr 2010 Over the rainbow 2·1,303 Posts	axn, unfortunatly I did.... but not that much, i clicked 3 time for p-1 and twice for p+1... my mouse is sometime disfonctional I will go to sleep less stupid tonight.. Last fiddled with by firejuggler on 2010-07-13 at 17:45

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2010-07-13, 17:30	#928
axn Jun 2003 3²·5·113 Posts	@firejuggler: The factordb shows that you've done 1200 curves of P-1 and 560 curves of P+1. Say it ain't so!

2010-07-13, 18:30	#931
frmky Jul 2003 So Cal 100001001011₂ Posts	I've run 690 curves at B1=26e7. This represents a bit over 2t45 but a bit less than 0.5t50, so any factor will most likely be larger than 45 digits.