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Search: Posts Made By: Zhangrc
Forum: Software 2021-10-15, 09:50
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
Here you are :bounce:

Here you are :bounce:
Forum: Software 2021-10-13, 04:50
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
See the attachment below for details (the video...

See the attachment below for details (the video inside the 7z file). The bug is really strange because I couldn't find any variable in prime.txt and local.txt which equals to 3.
Forum: Software 2021-10-11, 04:38
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
I have both Windows Prime95 and Linux mprime,...

I have both Windows Prime95 and Linux mprime, running in the same directory. In mprime, it just prints the number of cores for each worker, but I have no chance to change it.
(although I can edit...
Forum: Software 2021-10-10, 23:42
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
Originally 2 workers, 4 cores each worker. and I...

Originally 2 workers, 4 cores each worker. and I face problems when changing the number of cores for each worker. I could change it from 4 to 3, but couldn't change it from 3 to 2.
Forum: Software 2021-10-10, 07:48
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
1. That old bug of changing "CPU cores to use...

1. That old bug of changing "CPU cores to use (multithreading)" haven't fixed yet. Sometimes I could not change the number of cores (for example, reducing from 4 to 3, then to 2, then to 1). The...
Forum: News 2021-10-09, 04:16
Replies: 4
Views: 804
Posted By Zhangrc
Much less than last year :confused:

Much less than last year :confused:
Forum: Marin's Mersenne-aries 2021-10-06, 09:28
Replies: 35
Views: 1,268
Posted By Zhangrc
Congratulations!!! It's time to add another...

Congratulations!!!
It's time to add another term for http://oeis.org/A000043!
Forum: Software 2021-10-03, 03:59
Replies: 74
Sticky: Prime95 30.7
Views: 4,489
Posted By Zhangrc
Excuse me, but where's the source code?

Excuse me, but where's the source code?
Forum: Software 2021-10-02, 03:05
Replies: 479
Views: 51,132
Posted By Zhangrc
No because log(ab)=log(a)+log(b). O(log Mp2/2) is...

No because log(ab)=log(a)+log(b). O(log Mp2/2) is O(log 22p-1) = O(2p-1).
Forum: Software 2021-10-01, 12:27
Replies: 479
Views: 51,132
Posted By Zhangrc
The time complexity is almost linear logarithmic,...

The time complexity is almost linear logarithmic, O(log(ab)).

int gcd(int x,int y )
{
if(x < y) return gcd(y,x); // x>y
if( y == 0) return x; // if y=0, x is GCD
else
{
...
Forum: Lone Mersenne Hunters 2021-09-28, 09:09
Replies: 1,961
Views: 263,073
Posted By Zhangrc
If you mean >1G factors, There are plenty of...

If you mean >1G factors, There are plenty of them. Really easy to find :)
M9936653029 has a factor: 213977058851543423
M9936653539 has a factor: 246744834363283577
M9936654059 has a factor:...
Forum: Information & Answers 2021-09-26, 14:39
Replies: 58
Views: 8,151
Posted By Zhangrc
You can try NFS...

You can try NFS M1217/141065889786325378120502378437521368981420168194011324498831469066398800377270303571726687433864860259570077205499951967 which is much smaller than M1061.
Forum: Marin's Mersenne-aries 2021-09-25, 08:51
Replies: 19
Views: 969
Posted By Zhangrc
How long exactly? For me, TF from 2^76 to 2^77...

How long exactly?
For me, TF from 2^76 to 2^77 takes 3 hours while PRP and P-1 takes 11 to 12 days. It still make sense to TF to 2^77.
Forum: Marin's Mersenne-aries 2021-09-25, 08:42
Replies: 19
Views: 969
Posted By Zhangrc
Me too, that doesn't hurt your throughput. Would...

Me too, that doesn't hurt your throughput. Would you like to help with some wavefront TF?
Forum: Marin's Mersenne-aries 2021-09-25, 08:36
Replies: 19
Views: 969
Posted By Zhangrc
Me too. However we should compare the time of...

Me too. However we should compare the time of running TF and P-1 on the same GPU, not TF on GPU and P-1 on CPU.
Forum: Marin's Mersenne-aries 2021-09-25, 08:15
Replies: 19
Views: 969
Posted By Zhangrc
That's my point: They have all been done months...

That's my point: They have all been done months before, and if we still focus on these "recommended" bounds, we might have nothing to do (TF at the PRP wavefront) in the future.
Forum: Marin's Mersenne-aries 2021-09-25, 08:08
Replies: 19
Views: 969
Posted By Zhangrc
Yes if you want to find more factors, no if you...

Yes if you want to find more factors, no if you want to save more time.


You are referring to your 168,***,*23, I suppose?
Forum: Marin's Mersenne-aries 2021-09-25, 07:48
Replies: 19
Views: 969
Posted By Zhangrc
The bounds are a little high, though. Not...

The bounds are a little high, though.

Not that high. It's about 0.04/(2/78) = 1.56 times higher. However, with TF done to 2^78, one need smaller P-1 bounds to reach desired probability, thus...
Forum: Marin's Mersenne-aries 2021-09-25, 04:17
Replies: 19
Views: 969
Posted By Zhangrc
Trial factoring to > 2^77?

Nowadays people mainly do trial factoring in the two-k project (which I have very little interest), and GPU72 is releasing TF assignments to 2^76 and seems very reluctant to give any higher bounds....
Forum: mersenne.ca 2021-09-21, 03:00
Replies: 691
Sticky: mersenne.ca
Views: 92,990
Posted By Zhangrc
I'll do them all by TFing them to 74 bits. I'll...

I'll do them all by TFing them to 74 bits. I'll finish them by tonight.
Are there other exponents with higher TF done but intermediate levels missing in the 100-120M range?
Forum: Software 2021-09-21, 02:53
Replies: 479
Views: 51,132
Posted By Zhangrc
Try turning off the swapfile.sys and allocating...

Try turning off the swapfile.sys and allocating 8GB for your Prime95 (If there are no other applications running on your computer) and see if this happens again.
Forum: GPU to 72 2021-09-19, 12:31
Replies: 5,215
Views: 374,038
Posted By Zhangrc
The "assignments" page on GPU72 isn't functioning...

The "assignments" page on GPU72 isn't functioning properly.
The settings on the graph attached below yields 122M exponents, like Factor=N/A,122012131,75,77, which is inconsistent with the preview.
Forum: PrimeNet 2021-09-12, 03:12
Replies: 35
Views: 2,293
Posted By Zhangrc
See https://www.mersenne.ca/cudalucas.php for...

See https://www.mersenne.ca/cudalucas.php for details. The prices are a bit obsolete, but you could find that the older models (RX 5xxx(XT), Radeon VII) are much cheaper.
Forum: PrimeNet 2021-09-10, 16:17
Replies: 35
Views: 2,293
Posted By Zhangrc
You can if you want. RX 6900 XT or Radeon 7 or...

You can if you want. RX 6900 XT or Radeon 7 or other recent AMD Radeon cards can complete a PRP in less than two days, while a 3090 needs 4 to 5 days.
You need to run a software on it, called GPUowl.
Forum: PrimeNet 2021-09-04, 12:27
Replies: 35
Views: 2,293
Posted By Zhangrc
Something, like increasing the amount of money...

Something, like increasing the amount of money for discovering Mersenne primes, or setting up an award for finding large factors, would help.
Showing results 1 to 25 of 97

 
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