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Search: Posts Made By: henryzz
Forum: Puzzles 2020-11-25, 20:32
Replies: 20
Views: 237
Posted By henryzz
I realized the first answer could have half its...

I realized the first answer could have half its 13s converted to any number. In fact, only 2 need to be 13s.

Using 2^11 was a nice solution.

9 of each using factorials...
Forum: Puzzles 2020-11-25, 17:39
Replies: 20
Views: 237
Posted By henryzz
Not much of a record but the first to use ^ ...

Not much of a record but the first to use ^
(13+13+13+13)/13 + (13+13/13)*(13-13/13)^((13+13)/13)


7 of each
(666+666+666+666)/666 + (13+666/666)*(13-13/13)^((13+13)/13)
Forum: Hardware 2020-11-23, 19:11
Replies: 826
Views: 128,079
Posted By henryzz
Are you able to saturate memory bandwidth without...

Are you able to saturate memory bandwidth without AVX512? If so how does power consumption compare at the lowest frequency that maxes bandwidth?
Forum: Puzzles 2020-11-09, 14:19
Replies: 31
Views: 1,408
Posted By henryzz
I would have thought that consulting jewellers on...

I would have thought that consulting jewellers on this sort of thing could be a little hit and miss. A negative from one doesn't mean too much unless it matches their speciality or something like...
Forum: Hardware 2020-11-09, 14:10
Replies: 70
Views: 5,169
Posted By henryzz
I think the whole channels thing will have a bit...

I think the whole channels thing will have a bit of a shakeup with DDR5. There are 2 32/40- bit channels in each DIMM for DDR5. Hopefully, this will lead to CPU designs being more flexible with the...
Forum: Prime Gap Searches 2020-11-07, 23:13
Replies: 197
Sticky: Prime Gap News
Views: 28,240
Posted By henryzz
How often are tables such as...

How often are tables such as https://primegap-list-project.github.io/lists/top-discoverers/ updated? I don't seem to have made it onto the list
Forum: Prime Gap Searches 2020-11-04, 11:45
Replies: 113
Views: 13,463
Posted By henryzz
I was more thinking about fairly deep sieving...

I was more thinking about fairly deep sieving rather than what is effectively a wheel sieve. I have coded a crude sieve that can do things like sieve A=1 to 1M for x=-50k to 50k up to p=100k in about...
Forum: Prime Gap Searches 2020-11-02, 17:17
Replies: 197
Sticky: Prime Gap News
Views: 28,240
Posted By henryzz
Just submitted a new record 133364, C??, 21.8868,...

Just submitted a new record 133364, C??, 21.8868, D.Stevens, 2020-11-02, 2647, 1559*6199#/11#-67062

Does it change from C?? to C?P on its own?
Forum: Factoring 2020-11-02, 14:12
Replies: 797
Views: 59,133
Posted By henryzz
The numbers in this file won't disappear. New...

The numbers in this file won't disappear. New ones will be added.
Forum: Prime Gap Searches 2020-11-01, 11:36
Replies: 113
Views: 13,463
Posted By henryzz
It strikes me that we are sieving the wrong...

It strikes me that we are sieving the wrong dimension. In A*p#/d+x we currently sieve over x. Why don't we sieve over A? For each A we will count how many sieves over x it has survived. The As with...
Forum: Prime Gap Searches 2020-10-30, 10:53
Replies: 113
Views: 13,463
Posted By henryzz
Very interesting work on optimizing the choice of...

Very interesting work on optimizing the choice of d#. Can't wait to try this new code.

This has made me realize that I don't know the recommended scripts for gap searching currently....
Forum: Software 2020-10-29, 11:48
Replies: 35
Views: 4,650
Posted By henryzz
Is there a possibility of running WSL?

Is there a possibility of running WSL?
Forum: Factoring 2020-10-28, 09:52
Replies: 797
Views: 59,133
Posted By henryzz
There is probably more low hanging fruit...

There is probably more low hanging fruit currently due to that big RB being cleared.
Forum: Five or Bust - The Dual Sierpinski Problem 2020-10-21, 10:25
Replies: 90
Views: 88,686
Posted By henryzz
Not much use posting that without the search...

Not much use posting that without the search limits
Forum: PrimeNet 2020-10-20, 20:10
Replies: 2,037
Views: 160,407
Posted By henryzz
How much complexity is support for v4 clients...

How much complexity is support for v4 clients adding now? Is that holding us back in any way? They aren't providing much in the way of results any more.
Forum: Factoring 2020-10-19, 22:04
Replies: 61
Views: 3,324
Posted By henryzz
Or better still, use tee

Or better still, use tee
Forum: Hardware 2020-10-17, 16:12
Replies: 9
Views: 636
Posted By henryzz
I believe .net core is much better at running on...

I believe .net core is much better at running on linux
Forum: Hardware 2020-10-14, 14:16
Replies: 26
Views: 1,740
Posted By henryzz
It would be interesting to see how many cores and...

It would be interesting to see how many cores and at what speed provide the maximum efficiency(lowest TDP limit) at the minimum clock speed that reaches 130 iter/sec
Forum: Math 2020-10-14, 12:37
Replies: 12
Views: 694
Posted By henryzz
For 2^n+1 to be prime n must be a power of 2...

For 2^n+1 to be prime n must be a power of 2 https://mathworld.wolfram.com/FermatNumber.html has a proof of this.
Forum: Hardware 2020-10-09, 12:55
Replies: 26
Views: 1,740
Posted By henryzz
Is it possible the L3 bandwidth limit is being...

Is it possible the L3 bandwidth limit is being hit?
Forum: News 2020-10-06, 14:09
Replies: 311
Views: 28,807
Posted By henryzz
We don't although for a Mersenne prime we have a...

We don't although for a Mersenne prime we have a tradition of multiple tests. I think the EFF might have required it back when we were going for the 10M digit prize.
Given we have had false-positive...
Forum: Math 2020-10-06, 05:20
Replies: 8
Views: 624
Posted By henryzz
It looks like Yang's paper is an improvement to...

It looks like Yang's paper is an improvement to clarity. I have tried and failed with other references in the past. Time for another go at some point. Congratulations on getting this working.
Forum: Software 2020-10-05, 08:27
Replies: 6
Views: 437
Posted By henryzz
Better still might be to reduce the cpu speed to...

Better still might be to reduce the cpu speed to match the memory throughput and still use all cores. Generally lower speeds need less power/cycle. Experimentation might be needed there.
Forum: Software 2020-09-19, 05:50
Replies: 457
Views: 37,741
Posted By henryzz
What is the best way to convert fkbnsieve output...

What is the best way to convert fkbnsieve output to abc format rather than abcd?
Forum: Software 2020-09-19, 05:31
Replies: 35
Views: 2,438
Posted By henryzz
It sounds like the additional memory usage(and...

It sounds like the additional memory usage(and hence memory bandwidth) may be an issue. Would 64x be enough that arithmetic using double-floats would be useful?
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