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Forum: Aliquot Sequences 2021-03-06, 16:18
Replies: 959
Views: 70,082
Posted By henryzz
I think the trick would be to prove that: ...

I think the trick would be to prove that:
2^(2^3 * 3^2 * 5 * 7 * k + 1) - 1 == 1 mod d
3^(2^3 * 3^2 * 5 * 7 * k + 1) - 1) / 2 == 1 mod d
6^(2^3 * 3^2 * 5 * 7 * k) == 1 mod d

If this is true...
Forum: Aliquot Sequences 2021-03-05, 07:44
Replies: 959
Views: 70,082
Posted By henryzz
The p27 factor just strengthens the argument....

The p27 factor just strengthens the argument. Choosing 20 digits probably wasn't sensible given that the trivially provable 6 digits indicates it is deficient (1+10^-6)^floor(353/6) is...
Forum: Aliquot Sequences 2021-03-04, 22:22
Replies: 959
Views: 70,082
Posted By henryzz
Assuming no factors below 1e20 then the maximum...

Assuming no factors below 1e20 then the maximum abundance contribution of the C353 can be upper bounded by ((1e20+1)/1e20)^(floor(353/20))= (1+1e-20)^17= 1.00000000000000000017 or there about.
Forum: Aliquot Sequences 2021-03-04, 22:09
Replies: 959
Views: 70,082
Posted By henryzz
What is the upper bound on the abundance...

What is the upper bound on the abundance contribution of the C353? 3*5*7*13*229*457 already has an abundance ratio of 1.982=s(3*5*7*13*229*457)/3*5*7*13*229*457
Forum: Aliquot Sequences 2021-02-22, 20:05
Replies: 29
Views: 1,002
Posted By henryzz
If windows they CADO will run under WSL(once you...

If windows they CADO will run under WSL(once you get it to compile).
Forum: Software 2021-02-22, 19:18
Replies: 12
Views: 3,668
Posted By henryzz
Has this ended up upgrading your WSL to WSL2? I...

Has this ended up upgrading your WSL to WSL2?
I now have to log into WSL since making that upgrade.
Forum: Factoring 2021-02-19, 23:33
Replies: 936
Views: 83,649
Posted By henryzz
What's the target? How does the solving time...

What's the target? How does the solving time scale?
Forum: Prime Gap Searches 2021-02-16, 11:25
Replies: 233
Sticky: Prime Gap News
Views: 42,039
Posted By henryzz
Is there any chance that the colours and legend...

Is there any chance that the colours and legend could update if you restrict the range? Also is there a way I could reproduce this locally with a larger maximum range?
Forum: Factoring 2021-02-11, 17:43
Replies: 936
Views: 83,649
Posted By henryzz
I am no expert on MPI running although there...

I am no expert on MPI running although there supposed to be a speedup. Posts #229 and #230 from https://mersenneforum.org/showthread.php?t=24211&page=13 would be worth reading.

After googling...
Forum: Factoring 2021-02-10, 11:00
Replies: 936
Views: 83,649
Posted By henryzz
Is this using MPI? On a multi-cpu system that...

Is this using MPI? On a multi-cpu system that should help.
Forum: Prime Gap Searches 2021-02-09, 14:17
Replies: 233
Sticky: Prime Gap News
Views: 42,039
Posted By henryzz
That's very irritatingly close. It is also a very...

That's very irritatingly close. It is also a very impressive merit for the size. You have knocked 4 of your own records off the record watermarks list with this one. Is this the first gap to beat...
Forum: Chess 2021-02-07, 09:51
Replies: 12
Views: 993
Posted By henryzz
Move sorting early in a game may be improved by...

Move sorting early in a game may be improved by pairing the compressor with an opening book.
Forum: Cunningham Tables 2021-02-07, 09:41
Replies: 17
Views: 1,769
Posted By henryzz
I think we are getting to the point where working...

I think we are getting to the point where working out the crossover point between quartic and octic would be quite useful.
Forum: Prime Gap Searches 2021-02-07, 08:57
Replies: 233
Sticky: Prime Gap News
Views: 42,039
Posted By henryzz
The list is based on gap size not merit. Merits...

The list is based on gap size not merit. Merits can decrease as long as the gap size increases.
Forum: Science & Technology 2021-02-06, 20:56
Replies: 118
Views: 5,644
Posted By henryzz
That is a very strong assumption. New cases...

That is a very strong assumption. New cases dropped by 25% in a week in the UK(data delayed by a week). If that continues the risk will be lots lower by the time Person B is protected. We may get...
Forum: Hardware 2021-02-06, 20:41
Replies: 4
Views: 457
Posted By henryzz
Memory bandwidth is often the issue. More...

Memory bandwidth is often the issue. More recently some cpus have had enough L3 cache that memory won't be needed. This threadripper is likely to be one of them.
Forum: Prime Gap Searches 2021-02-06, 17:32
Replies: 233
Sticky: Prime Gap News
Views: 42,039
Posted By henryzz
I have just submitted a new batch of records...

I have just submitted a new batch of records including:
330132 27.904 43249 * 11987#/505915410 -116640 to +213492

This a new record watermark gap. There are no larger known gaps for smaller...
Forum: Prime Gap Searches 2021-02-05, 11:00
Replies: 46
Views: 3,355
Posted By henryzz
Would it be possible for min-merit in gap_test.py...

Would it be possible for min-merit in gap_test.py to default to whatever was used in the stats call?
Forum: Science & Technology 2021-02-03, 22:20
Replies: 118
Views: 5,644
Posted By henryzz
Apparently, the trick to get an early vaccine in...

Apparently, the trick to get an early vaccine in the UK is to volunteer for the last shift of the day at a vax centre. There will be vaccines they have to finish at the end of the day. Volunteers may...
Forum: Factoring 2021-02-01, 19:15
Replies: 936
Views: 83,649
Posted By henryzz
It looks like reducing the large prime bound to...

It looks like reducing the large prime bound to 35 bits might be the best solution. Has this been tried yet?
Forum: Factoring 2021-02-01, 16:08
Replies: 936
Views: 83,649
Posted By henryzz
It looks to me that wreck has pointed out some...

It looks to me that wreck has pointed out some issues that will soon become an issue even if they aren't quite an issue yet. How difficult would it be to future-proof issues 1 and 4? Would changing...
Forum: GPU Computing 2021-02-01, 15:57
Replies: 11
Views: 6,233
Posted By henryzz
VGA from the graphics card or the motherboard? As...

VGA from the graphics card or the motherboard? As far as I can tell it doesn't have VGA. Sometimes something needs to be connected at boot. It looks like that is HDMI or DisplayPort in this case.
Forum: Forum Feedback 2021-02-01, 10:22
Replies: 18
Views: 7,141
Posted By henryzz
Running on known primes isn't exactly the normal...

Running on known primes isn't exactly the normal use case. Maybe a better thing to mention would be the error checking contained in tests which has a very high probability of finding errors.
Forum: Number Theory Discussion Group 2021-01-31, 23:24
Replies: 6
Views: 609
Posted By henryzz
Can you give any examples on decent size numbers?

Can you give any examples on decent size numbers?
Forum: Software 2021-01-29, 16:44
Replies: 543
Views: 59,252
Posted By henryzz
Is that comparison without sr1sieve using a...

Is that comparison without sr1sieve using a Legendre symbol cache? As far as I can tell srsieve2 with sr1sieve logic is spending around 30% of its time calculating legendre symbols. I get the...
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