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Forum: Miscellaneous Math 2021-10-27, 08:33
Replies: 350
Views: 32,644
Posted By Zhangrc
At least there's one special thing about 168 that...

At least there's one special thing about 168 that has mathematical significance:
The simple group of order 168, PSL(2,Z/7Z), is the second smallest non-trivial simple group. :bounce:
Forum: Marin's Mersenne-aries 2021-10-23, 02:06
Replies: 644
Views: 109,418
Posted By Zhangrc
Took this: ...

Took this:
CERT=0000000000000000000000000B36D139,1,2,188141881,-1,1469859
Will finish this afternoon.
Forum: Data 2021-10-22, 03:32
Replies: 15
Views: 942
Posted By Zhangrc
Why? Please show me the reason. We want to...

Why? Please show me the reason.
We want to clear as much as possible using as little computing power. Running large bounds of P-1 on a NF to 2^78 exponent will a lot of time but has little chance...
Forum: Data 2021-10-22, 00:19
Replies: 15
Views: 942
Posted By Zhangrc
Off topic. Would you like to help? Any help is...

Off topic. Would you like to help? Any help is greatly appreciated.
Forum: Data 2021-10-22, 00:04
Replies: 15
Views: 942
Posted By Zhangrc
I'll do that after I finish PRP M109769981. My...

I'll do that after I finish PRP M109769981.
My conputing power is too weak to finish 108.3M on time. Anyone want to help?
Forum: Data 2021-10-21, 23:49
Replies: 15
Views: 942
Posted By Zhangrc
Yes, but there are only 1700 unverified exponents...

Yes, but there are only 1700 unverified exponents in that range. Even if Ben Delo does two third of the work, the average probability is about 4.4%, so still about 15 to go. That could be done by TF...
Forum: Data 2021-10-21, 07:44
Replies: 15
Views: 942
Posted By Zhangrc
Getting <2k unfactored exponents for 108.3M

Currently https://www.mersenne.ca/status/tf/0/0/4/10800 shows that there are 2096 unfactored exponents. However, with the expected 4% probability of finding a factor in P-1, we may still have 2020...
Forum: Software 2021-10-20, 06:47
Replies: 25
Views: 711
Posted By Zhangrc
Yes. Try version 20 and before at...

Yes. Try version 20 and before at https://download.mersenne.ca/gimps_archive/archived_executables/p95v20.zip, although it makes no sense to get any assignment.
Forum: mersenne.ca 2021-10-20, 05:16
Replies: 16
Views: 698
Posted By Zhangrc
The number 114514 is just popular among Chinese...

The number 114514 is just popular among Chinese teenagers. Maybe because its pronunciation in Chinese is similar to some word in Japanese("better world would come?") I don't fully understand. But the...
Forum: Marin's Mersenne-aries 2021-10-19, 14:27
Replies: 20
Views: 1,137
Posted By Zhangrc
M108398111 has a factor: 127634018463172816320049...

M108398111 has a factor: 127634018463172816320049 :bounce:

The 108.3M have 2096 unfactored exponents. If F-PM1 probability stays around 4% we might still have ~2020 exponents. I suggest we should...
Forum: Software 2021-10-18, 10:27
Replies: 91
Sticky: Prime95 30.7
Views: 6,326
Posted By Zhangrc
Even if PrimeNet is enabled, the number of...

Even if PrimeNet is enabled, the number of threads should be allowed to set to whatever number people want. Modern CPU cores are really fast, and the big cores in Alder Lake are even faster. (Never...
Forum: mersenne.ca 2021-10-18, 09:43
Replies: 16
Views: 698
Posted By Zhangrc
Doesn't matter. The rule of Category 4 says...

Doesn't matter. The rule of Category 4 says "Assignments are recycled if assignment is not started within 180 (unless manual testing) days or when the exponent moves midway into the first category...
Forum: mersenne.ca 2021-10-17, 10:33
Replies: 16
Views: 698
Posted By Zhangrc
I'd like to manually reserve them and TF them to...

I'd like to manually reserve them and TF them to 2^77, they are:
Factor=118690421,74,77
Factor=118690987,74,77
Forum: Software 2021-10-15, 09:50
Replies: 91
Sticky: Prime95 30.7
Views: 6,326
Posted By Zhangrc
Here you are :bounce:

Here you are :bounce:
Forum: Software 2021-10-13, 04:50
Replies: 91
Sticky: Prime95 30.7
Views: 6,326
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: 91
Sticky: Prime95 30.7
Views: 6,326
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: 91
Sticky: Prime95 30.7
Views: 6,326
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: 91
Sticky: Prime95 30.7
Views: 6,326
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: 1,221
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: 75
Views: 2,831
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: 91
Sticky: Prime95 30.7
Views: 6,326
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: 480
Views: 52,921
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: 480
Views: 52,921
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: 1,963
Views: 265,283
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: 8,382
Posted By Zhangrc
You can try NFS...

You can try NFS M1217/141065889786325378120502378437521368981420168194011324498831469066398800377270303571726687433864860259570077205499951967 which is much smaller than M1061.
Showing results 1 to 25 of 110

 
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