Available Ranges below 60 bit

[hbock]

As an idea where to start a new range I have added here a list of currently non-reserved ranges below 60 bit.
Status means that the majority of candidates is already factored to xx bits.
Please note that a range of 1 M contains 25000-26000 exponents to test. Furtheremore take into account that the factoring time for a distinct level also depends on the size of the exponent. For example factoring from 59-60 bit in the range of 76M is usually twice as fast as for 38M exponents.
In any case, please compare the selected range with the list of reserved ranges and let reserve your range before starting.

Range       Status  Remark
--------------------------------------------------

Nothing available!!

[ET_]

For example factoring from 59-60 bit in the range of 76M is usually twice as fast as for 38M exponents.

Gee... I thought it were twice as slow... :?

Luigi

[lycorn]

Originally Posted by hbock

As an idea where to start a new range I have added here a list of currently non-reserved ranges below 60 bit.l

The 78-79M range is reserved by myself (78 - 78.9M) and jocelynl (78.9 - 79M). We´ve posted threads on that subject. ;)

[smh]

Originally Posted by ET_

Gee... I thought it were twice as slow... :?

Luigi

No, factoring a 76M number to xx bits will be faster. All factors of Mersenne numbers are of the form 2*K*P+1 where P is the M number you test.

[hbock]

Originally Posted by lycorn

The 78-79M range is reserved by myself (78 - 78.9M) and jocelynl (78.9 - 79M). We´ve posted threads on that subject. ;)

I have edited the table accordingly.

[tom11784]

Who do I let know I want to do 69.5M-70.0M range?

And when I run decomp on my command line it says it's not "recognized as an internal or external command, operable program, or batch file." So I guess I'll ask where to get the two zip files mentioned under "How to start?"

[cheesehead]

Originally Posted by tom11784

Who do I let know I want to do 69.5M-70.0M range?

You do that by starting a new thread in this LMH section with a title like "69.5M-70M to 2^62" -- which I see you've done!

The coordinator checks in this forum once in a while, notes which threads are new, and gets his notifications from their titles and/or content.

And when I run decomp on my command line it says it's not "recognized as an internal or external command, operable program, or batch file." So I guess I'll ask where to get the two zip files mentioned under "How to start?"

From the "How to start?" thread:

"... Then from the page
http://www.mersenne.org/status.htm
we download decomp.zip and nofactor.zip. ..."

On that GIMPS Status page at http://www.mersenne.org/status.htm, under the status table is a section titled "GIMPS Milestones", then farther down another section titled "The Mersenne Database" in which are several links. If you take a look at those links, you'll find the ones that lead to decomp.zip (underlined text says "special program") and nofactor.zip (underlined text says "trial factored").

It's sort of an obstacle course to ensure that only those with a certain amount of determination, curiosity and perseverence will be able to participate. :)

... unless they know the (shhhh) shortcut to the page where all the GIMPS files are plainly listed by name: http://64.66.6.250/gimps/

[tom11784]

ya - only took me a few hours to get it set up - and then 10 minutes to figure out i had to uncheck communicating with PrimeNet server

[hbock]

At the moment it's not possible for me to edit this table (only moderators have the rights to edit their postings).

Following has changed :

76-77 M has to be removed (it's reserved for 62 bit)
31.5-32 M, status 59 bit, is free now (was finished from 58 to 59 bit)

[hbock]

to remove :

31.5-32M
58.1-59M

to add :

43-44M Status 59 bit (about 19800 exponents left)

[antiroach]

since there are no more ranges available below 60 bit, should a new thread be started stating available ranges below 61 bit ? :)