mersenneforum.org Official "Raiders of the Lost Sequences" thread
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 2009-07-28, 17:25 #1 Greebley     May 2009 Dedham Massachusetts USA 3×281 Posts Official "Raiders of the Lost Sequences" thread So I finished my search for open-ended sequences that are not in the list. I found 3 potential sequences that were not on the Aliquot Sequence Summary Pages: 254568 547140 583950 They do not list a merge, seem to be correct, are at or above 80 digits, and don't end with the same value as any other sequence. Only if one of the few missing sequences merges with them would they not be open-ended. I therefore think they are sequences that should be included in the list of open sequences. This puts my count of open-ended sequences at 9429. If someone knows why they aren't listed (someone found they terminate?), then post. I think I will take them to 100 digits to see if they get that far, so reserve them to me.
 2009-07-28, 17:42 #2 10metreh     Nov 2008 2×33×43 Posts Sorry, couldn't resist changing the thread title in light of the action in Forum Feedback... (In case you want to know, the old thread title was The three lost sequences??) Last fiddled with by 10metreh on 2009-07-28 at 17:54
 2009-07-28, 19:10 #3 kar_bon     Mar 2006 Germany 3·23·43 Posts as an official member of the RieselPrimeSearcher-Group "Raiders of the Lost Primes" (BTW: the name was my suggestion!) i have found the three lost sequences: have a look at Wolfgangs page: 2001-12-09: 254568 is a side-sequence to 59688 - 254568:i1903 = 59688:i21 = 9111030 2002-06-21: 547140 is a side-sequence to 32016 - 547140:i1657 = 32016:i44 = 481216 2002-07-16: 583950 is a side-sequence to 78660 - 583950:i2880 = 78660:i13 = 2414798 so no new open seqs (for now)!
 2009-07-28, 19:31 #4 Greebley     May 2009 Dedham Massachusetts USA 3·281 Posts Looking at the indices, these happen past 80 digits. They must have been run farther. I will get the database up to date with the info you have posted.
2009-07-28, 19:34   #5
kar_bon

Mar 2006
Germany

3·23·43 Posts

Quote:
 Originally Posted by Greebley Looking at the indices, these happen past 80 digits. They must have been run farther. I will get the database up to date with the info you have posted.
i think Wolfgang (and who else) have tested some 'promising' seqs a little bit further (don't know when those stepped down) and therefore of there merging, he deleted them of his list, like the C9C30 and others, but mentioned them in the history!

 2009-07-28, 21:15 #6 Greebley     May 2009 Dedham Massachusetts USA 84310 Posts Are any of our open ended sequences listed as terminating or merging? Have you ever checked?
 2009-07-28, 21:20 #7 kar_bon     Mar 2006 Germany 3×23×43 Posts no, not checked that page, but i've checked Wolfgang's latest C9C30 file against my summary and they are equal!
 2009-07-30, 15:46 #8 Greebley     May 2009 Dedham Massachusetts USA 3×281 Posts Ok, the sequences mentioned are now in the database to their merges and are no longer open-ended.
 2009-07-30, 15:50 #9 Greebley     May 2009 Dedham Massachusetts USA 3·281 Posts Oh, the list you referred to also mentions 47784 and you can fill in the question marks for that entry. Looks like Bosma found it. Last fiddled with by Greebley on 2009-07-30 at 15:51
 2009-07-30, 19:18 #10 Greebley     May 2009 Dedham Massachusetts USA 3×281 Posts 19410 and 42800 should now be the only two sequences under 1 million that are open ended and don't appear on the summary page. However both are in the list as prime and merged and it is only a matter for me to run the seqs up to their resolution. At that point the db and summary list should agree barring only a very recent submission of a terminated sequence to the db that is not yet in the summary. I calculated this automatically and get the same results, so I have high confidence there are no missing open sequences once I prove 19410 and 42800 terminate.
2009-07-30, 19:48   #11
wolfcrey

Jul 2009
Aachen, Germany

41 Posts

Quote:
 Originally Posted by kar_bon as an official member of the RieselPrimeSearcher-Group "Raiders of the Lost Primes" (BTW: the name was my suggestion!) i have found the three lost sequences: have a look at Wolfgangs page: 2001-12-09: 254568 is a side-sequence to 59688 - 254568:i1903 = 59688:i21 = 9111030 2002-06-21: 547140 is a side-sequence to 32016 - 547140:i1657 = 32016:i44 = 481216 2002-07-16: 583950 is a side-sequence to 78660 - 583950:i2880 = 78660:i13 = 2414798 so no new open seqs (for now)!
I got the same data
Wolfgang

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