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Forum: No Prime Left Behind 2022-08-17, 21:17
Replies: 1,662
Views: 254,658
Posted By gd_barnes
623*2^1787546-1 is prime

623*2^1787546-1 is prime
Forum: Aliquot Sequences 2022-08-17, 21:09
Replies: 722
Views: 31,188
Posted By gd_barnes
Ed, You can also remove the above sequences...

Ed,

You can also remove the above sequences from post 1 and 684 to avoid confusion.

Gary
Forum: Aliquot Sequences 2022-08-17, 10:32
Replies: 722
Views: 31,188
Posted By gd_barnes
720^56 and 1058^51 terminate This leaves 2...

720^56 and 1058^51 terminate

This leaves 2 remaining for base 720.

I brought all of the cofactors for same-parities up to C>=120 tonight. There were 9 such sequences for starting-size <=185,...
Forum: Aliquot Sequences 2022-08-17, 04:29
Replies: 722
Views: 31,188
Posted By gd_barnes
See my post #715. The ones in that post can be...

See my post #715. The ones in that post can be removed from your list in #684 as well as from the reservations post #1.
Forum: Aliquot Sequences 2022-08-17, 03:40
Replies: 722
Views: 31,188
Posted By gd_barnes
Then they match! :-) After our previous...

Then they match! :-)

After our previous discussion, I no longer considered merges as remaining and removed them from my spreadsheet resulting in base 70 having zero remaining.

Semantics...
Forum: Aliquot Sequences 2022-08-16, 22:59
Replies: 722
Views: 31,188
Posted By gd_barnes
The following post 1 reservations were impacted...

The following post 1 reservations were impacted by my recent effort to ECM/initialize everything up to starting size 185:

107^91: was 182/139 now 178/177
193^79: was 175/139 now 165/163...
Forum: Aliquot Sequences 2022-08-16, 14:18
Replies: 722
Views: 31,188
Posted By gd_barnes
109^89 terminates

109^89 terminates
Forum: Aliquot Sequences 2022-08-16, 12:14
Replies: 722
Views: 31,188
Posted By gd_barnes
I did my usual thing on all 3 after I saw his...

I did my usual thing on all 3 after I saw his post. 57^99 advanced one more iteration after his effort. It scores pretty well but there are others still that are better so I won't mess with it for...
Forum: Aliquot Sequences 2022-08-16, 09:30
Replies: 722
Views: 31,188
Posted By gd_barnes
120^88 terminates

120^88 terminates
Forum: Aliquot Sequences 2022-08-16, 07:48
Replies: 722
Views: 31,188
Posted By gd_barnes
To give us a better idea of how far we've come,...

To give us a better idea of how far we've come, below is a list of bases that have had all of their same-parity sequences terminated.

2
3
5
6
7
10
11
12
Forum: Aliquot Sequences 2022-08-16, 00:53
Replies: 722
Views: 31,188
Posted By gd_barnes
I added the < 150 digits current size list to my...

I added the < 150 digits current size list to my last post. I forgot the most obvious one.

Any place in my last few posts where I said opposite-parity, I meant same-parity. Also, the final...
Forum: Aliquot Sequences 2022-08-16, 00:04
Replies: 722
Views: 31,188
Posted By gd_barnes
Here are updated lists of same-parity sequences...

Here are updated lists of same-parity sequences with current size < 150 digits, no known factor, and large smallest factor. There are some new sequences from the last lists since they now include...
Forum: Aliquot Sequences 2022-08-15, 23:41
Replies: 722
Views: 31,188
Posted By gd_barnes
Here are updated lists of bases with 1-2...

Here are updated lists of bases with 1-2 same-parity sequences remaining as of this post. Most are ECM'd to t35. Some may be ECM'd to t40.

Bases with 1 remaining:

47^99: 161/126/3
277^69:...
Forum: Aliquot Sequences 2022-08-15, 23:25
Replies: 722
Views: 31,188
Posted By gd_barnes
137^85 and 179^81 terminate I have expanded...

137^85 and 179^81 terminate

I have expanded my search area up to a starting size (index=0) of 185 digits from 180 digits. This means that all same-parity sequences starting at <= 185 digits have...
Forum: Aliquot Sequences 2022-08-15, 14:39
Replies: 722
Views: 31,188
Posted By gd_barnes
510510^28 terminates Base 510510 has 1...

510510^28 terminates

Base 510510 has 1 sequence remaining.


That's a lot of patience. Good luck!
Forum: Aliquot Sequences 2022-08-15, 13:50
Replies: 722
Views: 31,188
Posted By gd_barnes
Later today I'll post some updated lists. If...

Later today I'll post some updated lists.

If you don't see anything reasonable on your updated 1/2 remaining lists, you could refer back to the last current size < 150 list or the largest small...
Forum: Aliquot Sequences 2022-08-15, 11:27
Replies: 722
Views: 31,188
Posted By gd_barnes
47^95 and 89^93 terminate I'm working on...

47^95 and 89^93 terminate

I'm working on 510510^28.

Base 47 now has 2 sequences remaining. But this is a strange one. One of the remaining is 47^97. It merges with 1134 of the main project. ...
Forum: Aliquot Sequences 2022-08-14, 22:30
Replies: 722
Views: 31,188
Posted By gd_barnes
42^100 and 113^89 terminate Base 42 is...

42^100 and 113^89 terminate

Base 42 is complete.

75^87 and 1210^50 terminate

Base 1210 now has 2 remaining.

Thank you to Ed for the last two. :-)
Forum: No Prime Left Behind 2022-08-14, 21:39
Replies: 1,662
Views: 254,658
Posted By gd_barnes
825*2^1785134-1 is prime

825*2^1785134-1 is prime
Forum: Aliquot Sequences 2022-08-14, 09:53
Replies: 722
Views: 31,188
Posted By gd_barnes
I'm done with 14316^38. I'm now working on...

I'm done with 14316^38.

I'm now working on 42^100 and 113^89 until termination.

Ed,

I ran my own counts on sequences remaining by base in my spreadsheet to make sure I was up to date. I...
Forum: Aliquot Sequences 2022-08-14, 04:48
Replies: 722
Views: 31,188
Posted By gd_barnes
Here is a list of current same-parity sequences...

Here is a list of current same-parity sequences with current size < 150 digits as of this post:

510510^28: 145/143/109
75^87: 145/145/large
113^89*: 147/140/9054401
75^93: 147/143/11
271^65:...
Forum: Aliquot Sequences 2022-08-14, 03:50
Replies: 722
Views: 31,188
Posted By gd_barnes
42^98, 281^67, and 338^63 terminate Base 42...

42^98, 281^67, and 338^63 terminate

Base 42 has 1 sequence remaining.

Base 281 is complete!

Base 338 has 2 sequences remaining.

There are only 9 same-parity sequences with current size <...
Forum: Conjectures 'R Us 2022-08-13, 22:28
Replies: 682
Views: 86,631
Posted By gd_barnes
The n=100K-300K range has been fairly popular...

The n=100K-300K range has been fairly popular with the SRBase/BOINC people. This range was completed as part of our goals this year for bases up to 13 k's remaining. They have gone on to complete...
Forum: Conjectures 'R Us 2022-08-13, 10:46
Replies: 118
Views: 43,332
Posted By gd_barnes
8*432^n-1 searched to n=300K; no prime.

8*432^n-1 searched to n=300K; no prime.
Forum: Aliquot Sequences 2022-08-13, 10:11
Replies: 722
Views: 31,188
Posted By gd_barnes
I added an iteration to 281^67. It's now at...

I added an iteration to 281^67. It's now at 156/135/3 full ECM. I'm done with it. It is the only sequence remaining for base 281.

I will do some work on 14316^38 and 338^63.
Showing results 1 to 25 of 1000

 
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