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-   -   Sequence terminations and merges (https://www.mersenneforum.org/showthread.php?t=11837)

rodac 2015-01-18 08:53

[QUOTE=rodac;392713]1000336 i:1 = 959856, the first term is smaller than 1000336.[/QUOTE]

1000336 i:0 = 334280 i:10
334280 should be replacing 1000336 in the list of terminated sequences
334280 i:5156 = 601 Prime, all is done in the database.

henryzz 2015-01-24 13:39

Sorry for taking so long to respond. I have made the suggested change. If you find any others let me know.
If there are any sequences that were once merges but now terminate I suppose we could consider changing them. I am not sure what to mark a sequence if it merges with a lower sequence which then reaches a higher point before terminating.

rodac 2015-01-29 23:46

[QUOTE=henryzz;393413]Sorry for taking so long to respond. I have made the suggested change. If you find any others let me know.
If there are any sequences that were once merges but now terminate I suppose we could consider changing them. I am not sure what to mark a sequence if it merges with a lower sequence which then reaches a higher point before terminating.[/QUOTE]

OK. :smile:

these ones could be changed:

1011520 i: 1 = 474750 i: 7; 474750 ends i: 2724 = 43.

311202 ends i: 2729 = 43; 218966 is on downdriver run and is not a starting sequence.

373152 ends i: 4045 = 601 (merge with 6160)

894312 ends i: 6123 = 601 (merge with 6160)

453404 ends i: 3988 = 59 (merge with 334440)

493410 ends i: 4141 = 109 (merge with 228522)

920478 ends i: 5987 = 7 (merge with 163716)

schickel 2015-01-30 00:47

The way I had been marking terminations that were merges with a terminated sequence was as a merge with the terminated sequence. After Wolfgang started updating his site again, I asked him which he prefers and he marks those sequence just as straight terminations, so that's how I started marking them.

I called out the couple that merged with 6160 because Wolfgang calls that sequence out as a pretty famous [URL="http://www.aliquot.de/aliquote.htm"]one[/URL] and I thought that another sequence that merged with one that terminated so many other linked sequences was noteworthy:[quote=Wolfgang Creyaufmüller]At Christmas 2001 Varona terminated the sequence 6160 and 1797[sup]*[/sup] numbers in (1, 10^6] changed their family status.[/quote]-------------
[sup]*[/sup] I wonder what the top ten for "terminated sequences that other sequences merge into" looks like.....

henryzz 2015-01-30 18:59

[QUOTE=rodac;393964]OK. :smile:

these ones could be changed:

1011520 i: 1 = 474750 i: 7; 474750 ends i: 2724 = 43.

311202 ends i: 2729 = 43; 218966 is on downdriver run and is not a starting sequence.

373152 ends i: 4045 = 601 (merge with 6160)

894312 ends i: 6123 = 601 (merge with 6160)

453404 ends i: 3988 = 59 (merge with 334440)

493410 ends i: 4141 = 109 (merge with 228522)

920478 ends i: 5987 = 7 (merge with 163716)[/QUOTE]
I will hopefully get to these this weekend. Did you check whether the max hight on any of them increased?

rodac 2015-01-30 19:48

[QUOTE=henryzz;394025]I will hopefully get to these this weekend. Did you check whether the max hight on any of them increased?[/QUOTE]

Sorry I have not checked the maximum height in the DB. :smile:

unconnected 2015-02-17 12:25

[URL="http://factordb.com/aliquot.php?type=1&aq=843528&big=1"]843528[/URL] terminates.

unconnected 2015-02-26 12:21

[URL="http://factordb.com/aliquot.php?type=1&aq=966444&big=1"]966444[/URL] terminates.

EdH 2015-02-26 16:48

[QUOTE=unconnected;395653][URL="http://factordb.com/aliquot.php?type=1&aq=843528&big=1"]843528[/URL] terminates.[/QUOTE]
[QUOTE=unconnected;396434][URL="http://factordb.com/aliquot.php?type=1&aq=966444&big=1"]966444[/URL] terminates.[/QUOTE]
Excellent!! Two for Two!!

wolfcrey 2015-02-28 09:07

[QUOTE=unconnected;396434][URL="http://factordb.com/aliquot.php?type=1&aq=966444&big=1"]966444[/URL] terminates.[/QUOTE]

congratulations:smile:

unconnected 2015-03-02 06:45

101844:i2541 = 638288:i10, so 638288 can be marked as "merge".


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