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2020-09-14, 22:25   #573
EdH

"Ed Hall"
Dec 2009

22×5×132 Posts

Quote:
 Originally Posted by yoyo I'll take bases 14, 15, 17, 18, 19 as usual until the remaining composite is > C139.
I've terminated 18^120 and only three others of the rest are <C140 for their remaining cofactor. Perhaps you should take all of them to prime through 18^129.

 2020-09-15, 05:11 #574 yoyo     Oct 2006 Berlin, Germany 22×3×72 Posts In fact I took all from 18^0 to 18^140. But many of them dropped out because they have either terminated or a composite > C139.
2020-09-15, 05:56   #575
RichD

Sep 2008
Kansas

313410 Posts

Quote:
 Originally Posted by yoyo I'll take bases 14, 15, 17, 18, 19 as usual until the remaining composite is > C139.
So few numbers are still available in base n=18. I will release my reservations for the few numbers I have in base 20. yoyo can have the entire table. I will focus on 770^33 and begin preliminary work on Table 31. I believe this is the last unclaimed base in post #457.

2020-09-15, 12:40   #576
EdH

"Ed Hall"
Dec 2009

D3416 Posts

Quote:
 Originally Posted by yoyo In fact I took all from 18^0 to 18^140. But many of them dropped out because they have either terminated or a composite > C139.
All the ones from 18^0 through 18^120 dropped out because RichD (<18^97) and I (>18^96) ran them to prime a while ago. But the ones left above exponent 120 were because they were >c140 for index 0. Three of those had cofactors <c140 and I see that they are now >c139. I was suggesting that you might want to take those 9 sequences to prime, even though they are currently above your >c139 threshold because they are all falling and will terminate soon.

Let me know, though, since if you do not want those 9, I will work on them leisurely.

2020-09-15, 12:53   #577
EdH

"Ed Hall"
Dec 2009

22×5×132 Posts

Quote:
 Originally Posted by RichD So few numbers are still available in base n=18. I will release my reservations for the few numbers I have in base 20. yoyo can have the entire table. I will focus on 770^33 and begin preliminary work on Table 31. I believe this is the last unclaimed base in post #457.
There are still two unaddressed bases suggested in post #280: 220 and 284. But, I'm not sure of the interest in those (amicable) bases ATM.

2020-09-15, 15:59   #578
garambois

Oct 2011

33·13 Posts

OK, I will take into account all your booking requests when I update next weekend.

I'm also waiting to know who will finally book the base 18 ?
For the moment, if you don't give me more details about this base 18, I will book it for EDH with the goal to finish the 9 remaining sequences.

Quote:
 Originally Posted by EdH There are still two unaddressed bases suggested in post #280: 220 and 284. But, I'm not sure of the interest in those (amicable) bases ATM.
I am also not sure of the interest of calculating the sequences of the bases 220 and 284, two amicable numbers !
On the other hand, if we calculate them, and if we find that the sequences have no particular interest, at least we will be certain. But you never know: if there was something "special" going on with the bases that are amicable numbers, it would be too stupid to miss it. If someone wants to calculate these two bases, I will gladly add them to the page, after the preliminary work.

 2020-09-15, 16:17 #579 yoyo     Oct 2006 Berlin, Germany 22·3·72 Posts I will currently not go above C139. You can book it to EdH. For base 18 volunteers have only 18^126 and 18^138 running.
2020-09-15, 16:41   #580
EdH

"Ed Hall"
Dec 2009

64648 Posts

Quote:
 Originally Posted by yoyo I will currently not go above C139. You can book it to EdH. For base 18 volunteers have only 18^126 and 18^138 running.
Thanks yoyo! I won't be near those for quite some time.

2020-09-15, 16:45   #581
EdH

"Ed Hall"
Dec 2009

22×5×132 Posts

Quote:
 Originally Posted by garambois OK, I will take into account all your booking requests when I update next weekend. I'm also waiting to know who will finally book the base 18 ? For the moment, if you don't give me more details about this base 18, I will book it for EDH with the goal to finish the 9 remaining sequences. I am also not sure of the interest of calculating the sequences of the bases 220 and 284, two amicable numbers ! On the other hand, if we calculate them, and if we find that the sequences have no particular interest, at least we will be certain. But you never know: if there was something "special" going on with the bases that are amicable numbers, it would be too stupid to miss it. If someone wants to calculate these two bases, I will gladly add them to the page, after the preliminary work.
At least for the near term, I will leave 220 and 284 for those with less resources. I'll work the higher sequences for base 18 and maybe look at the higher ones for base 98 later on.

Thanks Jean-Luc!

 2020-09-15, 16:56 #582 RichD     Sep 2008 Kansas 60768 Posts Looks like 31^4 and 31^18 may have merged. Can someone verify this? I am releasing all base 20 numbers.
 2020-09-15, 18:30 #583 Happy5214     "Alexander" Nov 2008 The Alamo City 22·97 Posts I am reserving (belatedly) n=162=2*3^4 to i=54 (120 digits). I've already terminated everything up to 162^44 using a combination of FactorDB, local yafu, and Dario Alpern's browser ECM/QS calculator.

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