New kind of Workunit

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Chechevatov

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Message 998 - Posted: 17 May 2017, 7:56:28 UTC

Good day to you!
I recieved some workunits in new format. For example yafu_C93_F1494953692_41_0.
Is it a part of aliquot sequences?
What numbers are factored in such workunits?
Thanks.
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Message 999 - Posted: 19 May 2017, 10:32:38 UTC

Hi,

you are right the workunits which doesn't contain _ali_ in the name are different composites which needs to factored.
They are taken from factordb. Here a statistic about them:
http://factordb.com/stat_1.php

I introduced them, because the Aliquot Sequence composites are big ond mainly available for the 8t and 16t application and user demand to get get work also for yafu and yafu-4t.

yoyo
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Chechevatov

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Message 1002 - Posted: 20 May 2017, 16:53:24 UTC

Thanks for your answer.
What exact number is factored in new WU?
Among composites of 93 digits I didn't find any beginning with 1494953692, and even beginning with 149495.
C93 means Composite number contains 93 digits, right?
What does it mean F1494953692?

And the second question:
Yafu-8t deals with composite numbers more than 130 digits long.
There are about 1000 unreserved sequences with cofactor size smaller than 130 digits long.
Do you choose new composite numbers from this list?

Thanks.
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Message 1003 - Posted: 20 May 2017, 19:22:57 UTC - in response to Message 1002.  

Thanks for your answer.
What exact number is factored in new WU?
Among composites of 93 digits I didn't find any beginning with 1494953692, and even beginning with 149495.
C93 means Composite number contains 93 digits, right?
What does it mean F1494953692?

This is just the timestamp when this wu was created.
The composite which is factored is in the wu.


And the second question:
Yafu-8t deals with composite numbers more than 130 digits long.
There are about 1000 unreserved sequences with cofactor size smaller than 130 digits long.
Do you choose new composite numbers from this list?

No.
The _ali_ wus workes on the sequences which are reserved to yafu@home.
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Chechevatov

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Message 1004 - Posted: 21 May 2017, 17:13:45 UTC

It's a pity!
I thought that unreserved sequences is a good choice for any composite numbers to factor.
Especially for sequences that recent progress was in 2015 or earlier.
There are nearly 200 such sequences with cofactor size less than 130 digits.
You don't have to reserve these sequences. Just make one more step.
Factoring 130 digit number takes near half a year on a modern computer.
That's why I think that such factoring wouldn't interfere with someone.
Thanks.
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Message 1007 - Posted: 25 May 2017, 15:32:03 UTC - in response to Message 1004.  

I haven't found an easy way to fetch those composites.
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Chechevatov

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Message 1009 - Posted: 30 May 2017, 16:22:02 UTC

Can I do it manually?
What format is good for you?

Text file with one composite number on each string
or
CSV file which contains sequence first number, composite number to factor, may be some other parameters

I can send it via email or publish it in a forum.
Thanks in advance.
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Message 1010 - Posted: 31 May 2017, 16:09:30 UTC - in response to Message 1009.  

It would be sufficient just to get a list of sequences which have small cofactors.

yoyo
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