mersenneforum.org Aliquot sequences that start on the integer powers n^i
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 2018-12-06, 04:18 #111 gd_barnes     May 2007 Kansas; USA 33·17·23 Posts My first "real" termination here: 13^98 terminates at term 1448 with prime=43 after starting at 110 digits!
2018-12-06, 19:27   #112
garambois

"Garambois Jean-Luc"
Oct 2011
France

5×137 Posts

Quote:
 Originally Posted by kar_bon Tried to download seqs from factorDB an found this: 3^108 got an error at index 1575: is: Code: 1574 . 10536346489696420770680 = 2^3 * 5 * 19 * 23 * 919 * 3067 * 423931 * 504457 1575 . 15539970862145288285320 = 2^3 * 5 * 11 * 23 * 1753 * 15733 * 55677051589 1576 . 24287246194437618095480 = 2^3 * 5 * 7 * 31 * 2861 * 7489 * 130592086759 should be: Code: 1574 . 10536346489696420770680 = 2^3 * 5 * 19 * 23 * 919 * 3067 * 423931 * 504457 1575 . 15540084064757285981320 = 2^3 * 5 * 23 * 181 * 593 * 594161 * 264867167 1576 . 21208836326841958327160 = 2^3 * 5 * 47 * 11281295918532956557 Perhaps there're more errors there after last offline/update, only checked for n=2 and 3 yet.
What can we do about it ?
Is it possible to correct this on DB ?

Thanks gd_barnes, I will update the next weekend.

Last fiddled with by garambois on 2018-12-06 at 19:30

 2018-12-09, 11:51 #113 garambois     "Garambois Jean-Luc" Oct 2011 France 5·137 Posts OK, the page is updated. Thank you all. Base 21 added and reserved by Happy5214, in accordance with its request.
 2018-12-10, 08:04 #114 kar_bon     Mar 2006 Germany 24·3·61 Posts 21^4 merges at index 46 with seq. 6552:i4
 2018-12-10, 08:24 #115 gd_barnes     May 2007 Kansas; USA 33×17×23 Posts In the larger sequences that begin at > 105 digits, I found several down drivers. I ran those until they were gone. Many had very wild rides. One terminated. Here are the updates: 10^109: 587 U115 (109) +582 iterations 10^113: 455 U104 (97) +451 10^117: 1215 U108 (105) +1211 12^107: 1378 U107 (99) +1371 12^109: 333 U112 (109) +331 13^98: 1448 U2 (2) +1445 (terminated as previously reported!) 13^106: 171 U103 (101) +160 Most of these were already updated before I reported them.
 2018-12-13, 16:15 #116 kar_bon     Mar 2006 Germany 24·3·61 Posts 11^66 reached 120 digits, added 3031 lines, driver 2*3
 2018-12-15, 15:57 #117 garambois     "Garambois Jean-Luc" Oct 2011 France 12558 Posts OK, the page is updated. Thanks to all. Note : By me, 3^152, 3^154, 3^156, 3^162, 3^168 at 120 digits or more. 3^164 terminated after 2595 iterations at a P3.
 2018-12-15, 16:06 #118 garambois     "Garambois Jean-Luc" Oct 2011 France 68510 Posts Now, in the power table of 3, we can see an isolated white cell : 3^108. kar_bon had reported this error on DB, a few posts above. I don't understand what's going on. I restarted the calculation on my computer, my program is not wrong though ! I don't know how to correct the mistake !
2018-12-16, 23:52   #119
kar_bon

Mar 2006
Germany

55608 Posts

Quote:
 Originally Posted by garambois I don't know how to correct the mistake !
You can't do anything here, Syd has to correct the database entry.

I've attached the corrected ELF-file for seq. 3^108: it's at 122 digits now with 2^6 * 127 driver.

To handle this in the scripts:
- copy the "108.htm" from the zip into the 3-folder (it's not correct in the factorization but in digits/index count)
- insert "rem " in front of the line for 108.htm in the "run4_get.bat" to suppress the download for this seq. (change again after calling "run3_make_download.bat")
- create data for this n as usual

If Syd corrected the database, everything will fine again.
Attached Files
 3_108.ZIP (144.4 KB, 62 views)

 2018-12-18, 13:18 #120 kar_bon     Mar 2006 Germany 24·3·61 Posts 11^36 and 11^42 done to >120digits
 2018-12-18, 16:22 #121 VBCurtis     "Curtis" Feb 2005 Riverside, CA 10011110100002 Posts Taking 13^12 for a spin.

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