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-   -   230 bits! M1237 (partially) factored (https://www.mersenneforum.org/showthread.php?t=14149)

petrw1 2010-11-03 00:37

230 bits! M1237 (partially) factored
 
[CODE]George Woltman Manual testing 1237 F-ECM Nov 2 2010 3:07PM 0.0 0.0000 2538207129840687799335203259492870476186248896616401346500027311795983 [/CODE]

Yeah George

I mean 230 bits

Prime95 2010-11-03 00:50

Not me, I just record the result.

Batalov 2010-11-03 00:50

That would be Lenstra et.al.

Yes, that's a [URL="http://mersenneforum.org/showthread.php?t=14145"]70-digit factor[/URL]. The 3rd largest.

bdodson 2010-11-03 01:48

[QUOTE=petrw1;235387][CODE]George Woltman Manual testing 1237 F-ECM Nov 2 2010 3:07PM 0.0 0.0000 2538207129840687799335203259492870476186248896616401346500027311795983 [/CODE]

Yeah George

I mean 230 bits[/QUOTE]

The title of this thread is distracting (from an excellent ECM factor),
even aside from the number of !!'s. Any chance of a moderator changing
digits to bits (or 230 to 70)? And, of course, M1237 is reduced to a
303-digit composite; rather than being factored. -bdodson

petrw1 2010-11-03 04:05

[QUOTE=bdodson;235391]The title of this thread is distracting (from an excellent ECM factor),
even aside from the number of !!'s. Any chance of a moderator changing
digits to bits (or 230 to 70)? And, of course, M1237 is reduced to a
303-digit composite; rather than being factored. -bdodson[/QUOTE]

:redface: :redface: :redface:

bdodson 2010-11-03 11:31

[QUOTE=petrw1;235395]:redface: :redface: :redface:[/QUOTE]

Sorry for grumbling; I had earlier read Bob's report of the p70 over on the
Cunningham Tables pages, objecting that M1237 is not in the Cunningham
range. The report from epfl in June describes the PS3 code as focussed
on 2^M -1 for M from 1100 to 1400, but this wasn't just any 2^M-1 ...
one of the few with no known factor. This is the first we've heard with
M > 1200, definitely a notable start, !!!! indeed.

-Bruce


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