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Forum: Aliquot Sequences 2019-11-30, 04:00
Replies: 40
Views: 5,343
Posted By AndrewWalker
Thanks again for the updates Paul and Jean-Luc!...

Thanks again for the updates Paul and Jean-Luc! Have just updated my list with your pairs and a few new ones of mine which takes it to 943 pairs. Have made this 7a, 8 will be at 1000 or more!


As...
Forum: Aliquot Sequences 2019-11-25, 07:14
Replies: 40
Views: 5,343
Posted By AndrewWalker
Thanks for the updates! I'll add these to my...

Thanks for the updates! I'll add these to my list, have also found a number
of others since my last update. I suspect most of those Paul found and I
missed are due to the factors being beyond the...
Forum: Aliquot Sequences 2019-11-14, 10:10
Replies: 40
Views: 5,343
Posted By AndrewWalker
Thanks Jean, confirm it's a new pair will add it...

Thanks Jean, confirm it's a new pair will add it to my lists!


This looks like it is just outside the range of one of my searches for (1+2*I)^2 *4 factors.
Will try to rediscover it!


Andrew
Forum: Aliquot Sequences 2019-11-06, 09:39
Replies: 40
Views: 5,343
Posted By AndrewWalker
Thanks Ed, I really hope the new pairs are...

Thanks Ed, I really hope the new pairs are useful, and would love to hear how they are useful!


In the future I'd like to post the pairs list more often, but without creating a new post each...
Forum: Aliquot Sequences 2019-10-28, 08:22
Replies: 40
Views: 5,343
Posted By AndrewWalker
List with factors included, hopefully haven't...

List with factors included, hopefully haven't goofed up, let me know if I have!


Andrew
Forum: Aliquot Sequences 2019-10-28, 07:12
Replies: 40
Views: 5,343
Posted By AndrewWalker
Here's the latest update, now 910 pairs! One pair...

Here's the latest update, now 910 pairs! One pair from the Ranthony Ashley Clark thesis,
a (5,5) type pair had eluded me but I managed to find it earlier in the year by tweaking
one of my searches...
Forum: Aliquot Sequences 2019-10-23, 06:51
Replies: 40
Views: 5,343
Posted By AndrewWalker
Huge congratulations to Paul, amazed he did this...

Huge congratulations to Paul, amazed he did this so quick! I hope his code is much
quicker than what I've been doing in pari as it could then be quite useful!


Have confirmed it in pari, CSigma...
Forum: Aliquot Sequences 2019-08-16, 07:59
Replies: 40
Views: 5,343
Posted By AndrewWalker
I'm changing a few pari scripts I wrote a while...

I'm changing a few pari scripts I wrote a while back and will give them a run. These will
mainly be randomised searches

One suggestion for anyone looking at these. The complex pairs I've found so...
Forum: Aliquot Sequences 2019-08-15, 11:22
Replies: 40
Views: 5,343
Posted By AndrewWalker
I've mentioned to Garambois via email that I've...

I've mentioned to Garambois via email that I've tried looking for small cycles of length 3 or more without success.
However, I had been using pari's factor() function in only the normal mode,so...
Forum: Aliquot Sequences 2018-12-04, 06:33
Replies: 40
Views: 5,343
Posted By AndrewWalker
760 pairs! I've found quite a few in the...

760 pairs!


I've found quite a few in the last few weeks, including some new largest pairs,
as I had the idea to search on (1+I)^m * (1+2I)^n * (1+4I) (multiplied by extra prime factors) which...
Forum: Aliquot Sequences 2018-11-30, 08:18
Replies: 40
Views: 5,343
Posted By AndrewWalker
Looks like I've probably reached 750 pairs, will...

Looks like I've probably reached 750 pairs, will do a stocktake and add some comments over the weekend!


Andrew
Forum: Information & Answers 2018-09-24, 12:16
Replies: 7
Views: 1,908
Posted By AndrewWalker
I'm not sure how to respond, but anyway!...

I'm not sure how to respond, but anyway! :smile::davar55::shock: I used a few trials, but not that many!


It was interesting exploring how far I could push this test, I got over 1000 but then...
Forum: Information & Answers 2018-09-18, 10:40
Replies: 7
Views: 1,908
Posted By AndrewWalker
Ha! (19:57) gp > (341-1)!%341 %54 =...

Ha!



(19:57) gp > (341-1)!%341
%54 = 0


Andrew
Forum: Aliquot Sequences 2018-06-24, 08:27
Replies: 40
Views: 5,343
Posted By AndrewWalker
Pair 600 found today :smile: Again please...

Pair 600 found today :smile:


Again please let me know if you spot any errors.


Andrew
Forum: Aliquot Sequences 2018-06-17, 07:58
Replies: 40
Views: 5,343
Posted By AndrewWalker
Next update at 600 pairs, very close!

Next update at 600 pairs, very close!
Forum: Aliquot Sequences 2018-04-23, 08:08
Replies: 4
Views: 1,640
Posted By AndrewWalker
The Giovanni Resta link on the OEIS page...

The Giovanni Resta link on the OEIS page apparently has up to 10^6, haven't looked
at any of the others.
Forum: Aliquot Sequences 2018-01-11, 11:57
Replies: 40
Views: 5,343
Posted By AndrewWalker
I discovered that pari when writing a...

I discovered that pari when writing a factorisation to a file leaves it on one line! So with
a bit of extra find/replace manipulation in Word here is a list of the pairs with factorisations.
...
Forum: Factoring 2017-12-18, 12:40
Replies: 497
Views: 54,911
Posted By AndrewWalker
Sean Irvine? I was working on factorial numbers...

Sean Irvine? I was working on factorial numbers +-1 well over 10 years ago and had a web page on them but haven't looked at them for a very long time. I remember you sent me lots of factors! Mainly...
Forum: Aliquot Sequences 2017-12-14, 10:05
Replies: 40
Views: 5,343
Posted By AndrewWalker
More of the same searching, now 515 pairs ...

More of the same searching, now 515 pairs

Andrew
Forum: Aliquot Sequences 2017-12-03, 08:09
Replies: 107
Views: 14,595
Posted By AndrewWalker
Congratulations on this latest update Robert! Can...

Congratulations on this latest update Robert! Can you please comment on if these are all 4 cycles and what types you have searched for.

Thanks,

Andrew.
Forum: Aliquot Sequences 2017-08-28, 09:11
Replies: 40
Views: 5,343
Posted By AndrewWalker
A big update, now have 423 pairs! Many of these...

A big update, now have 423 pairs! Many of these come from searching a common factor
with 4 extra small factors which I had done very little with earlier. Plus also many from
3 extra small factors
...
Forum: Aliquot Sequences 2017-08-22, 09:00
Replies: 37
Views: 6,253
Posted By AndrewWalker
Big congratulations on reaching this limit,...

Big congratulations on reaching this limit, doesn't seem that long ago we were finding 14 and 15 digit pairs! Do you have any estimates on how long getting to 20d will take? That will be a big...
Forum: Aliquot Sequences 2017-07-02, 02:48
Replies: 124
Views: 15,188
Posted By AndrewWalker
Congrats whoever found this! I was looking for a...

Congrats whoever found this! I was looking for a while for large pairs but
had little luck so have been trying a few things with the gaussian pairs lately.

Andrew

PS Ok I see it was Paul, well...
Forum: Aliquot Sequences 2017-05-08, 07:49
Replies: 40
Views: 5,343
Posted By AndrewWalker
I've been doing a bit more searching this year,...

I've been doing a bit more searching this year, here is my latest list which has 304 gaussian amicable pairs. It's getting harder to find them now!
Forum: Aliquot Sequences 2017-02-21, 10:29
Replies: 40
Views: 5,343
Posted By AndrewWalker
When I was doing the searching I posted about...

When I was doing the searching I posted about earlier, I searched through some of the sage packages such as mpmath and couldn't find anything else to caculate sigma for gaussian integers. You can...
Showing results 1 to 25 of 82

 
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