Brent tables reservations

[jcrombie]

Last one is finished.

Reserving:

50 131+

[chris2be8]

I've nearly done the last 3 so reserving:
35^154+1
85^106+1
97^103+1

Chris

[jcrombie]

Originally Posted by chris2be8

I've nearly finished them so my next 3 are:
59^133+1
76^109-1
97^119+1

Chris

Apparently 97^119+1 was finished on Dec 25, 2011 by Tomoya Adachi.
See http://www.asahi-net.or.jp/~KC2H-MSM/cn/whatsnew.htm

(Just noticed it. Hopefully this saves you a little bit of work.)

[chris2be8]

That's not 97^119+1. At least I can't find a factor of 97^119+1 on the page.

It's a good job because I'd already finished 97^119+1.

Chris

[jcrombie]

Originally Posted by chris2be8

That's not 97^119+1. At least I can't find a factor of 97^119+1 on the page.

It's a good job because I'd already finished 97^119+1.

Chris

You have to "decode" the entry a bit:

By Tomoya Adachi (December 25, 2011), by gnfs-lasieve4_64 + msieve....
(238 97 (239 452048378786343065135330908310174758445716582617464704073386748297875873299272262817) (P 105))

(I just noticed it when I checked to see if the number was finished with your last post)

[chris2be8]

I think I've cracked the code. "(238 97 (" means 97^238-1 with all the algebraic factors removed. But the results weren't put into factordb.

I'll email Richard Brent to tell him about the page.

Chris

[jcrombie]

Originally Posted by chris2be8

I think I've cracked the code. "(238 97 (" means 97^238-1 with all the algebraic factors removed. But the results weren't put into factordb.

I'll email Richard Brent to tell him about the page.

Chris

Feel free to email, but he does have the link already on his page. (The one to Hisanori Mishima and then to "Whats New")

I've gathered factors from different factoring projects in the past and passed them onto Richard, but since he has yet to absorb the 1.4M factor bomb I dropped on him in Dec 5, 2011, I've yet to send a new update. I've gathered all the factors from H Mishima's web site on June 10, 2012 so you can always check my website as well. (Sorry for the self-promotion , but I think it is relevant)

[jcrombie]

Some further thoughts:

Of course, the best thing would be to have the factors in factordb.com. I'll see if I can filter out the small factors (< 50 digits) and do a bulk update.

[jcrombie]

Originally Posted by jcrombie

Some further thoughts:

Of course, the best thing would be to have the factors in factordb.com. I'll see if I can filter out the small factors (< 50 digits) and do a bulk update.

After much use of "diff" and reporting 185 factors to factordb, factordb reported 2 factors added that were also brent composites. (43 136+ and 44 127-). Turns out that these were my own factors! Oooops. So, I don't believe there are any more missing factors.

[chris2be8]

I manually added a few factors from there to factordb last night. I only did ones with a 2 digit base since they were the ones I might be trying to do.

The only significant one was 98^119-1 (fortunately I'd not started that one yet). So it sounds as if we are safe now.

Chris

[chris2be8]

It's time for me to reserve a few more:
30^172+1
42^139-1
35^134+1

(The first two are GNFS targets.)

Chris