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Search: Posts Made By: alpertron
Forum: Software 2021-12-06, 17:45
Replies: 131
Views: 3,288
Posted By alpertron
We do not know if these people will accept doing...

We do not know if these people will accept doing only P-1. Some people only wants to perform PRP because of the prizes. So they would use multithreading to run as many PRP as possible.
Forum: Software 2021-12-06, 16:25
Replies: 131
Views: 3,288
Posted By alpertron
Assuming 10% of the users have huge amounts of...

Assuming 10% of the users have huge amounts of RAM, that will translate to only 0.2%
Forum: Software 2021-12-05, 03:02
Replies: 131
Views: 3,288
Posted By alpertron
It appears that 30.8 runs faster than previous...

It appears that 30.8 runs faster than previous versions on P-1 not only when there are large amounts on RAM, but also on small exponents.

In my case (using 8GB of RAM in an I5 3470) Prime95...
Forum: Data 2021-12-04, 17:26
Replies: 985
Views: 126,700
Posted By alpertron
Prime95 has just finished this task with no hang:...

Prime95 has just finished this task with no hang:

processing: P-1 no-factor for M9325159 (B1=50,000,000, B2=50,001,265,860)
CPU credit is 1312.7590 GHz-days.
Forum: Data 2021-12-02, 13:19
Replies: 985
Views: 126,700
Posted By alpertron
My system has 16 GB of RAM, and I have several...

My system has 16 GB of RAM, and I have several programs running at the same time. That's why I give 8 GB to Prime95. Otherwise the system would run slower.
Forum: Data 2021-12-02, 12:26
Replies: 985
Views: 126,700
Posted By alpertron
I'm running a more intensive test. The contents...

I'm running a more intensive test. The contents of the file worktodo.txt is:

[Worker #1]...
Forum: Data 2021-11-25, 15:18
Replies: 8
Views: 328
Posted By alpertron
Prime95 has not found the small factor when I ran...

Prime95 has not found the small factor when I ran P-1 with the bounds above because I added the known factors in the file worktodo.txt
Forum: mersenne.ca 2021-11-15, 22:07
Replies: 723
Sticky: mersenne.ca
Views: 97,901
Posted By alpertron
It is OK now. Thanks.

It is OK now. Thanks.
Forum: mersenne.ca 2021-11-15, 16:59
Replies: 723
Sticky: mersenne.ca
Views: 97,901
Posted By alpertron
Since the trial factorization of Mersenne numbers...

Since the trial factorization of Mersenne numbers with exponents greater than 1G is completed up to the 71-bit level, I think the tips at the top of https://www.mersenne.ca/tf1G/ should be erased.
Forum: Science & Technology 2021-10-22, 11:14
Replies: 6
Sticky: Poll: COVID vaccine type poll
Views: 702
Posted By alpertron
I received Sputnik in June and Moderna in...

I received Sputnik in June and Moderna in September, so I cannot complete the poll.
Forum: MattcAnderson 2021-10-20, 17:54
Replies: 24
Views: 1,097
Posted By alpertron
If you open my Polynomial factorization and roots...

If you open my Polynomial factorization and roots calculator (https://alpertron.com.ar/POLFACT.HTM), enter x^255-1 and press Factor, you will see after a few seconds the 255 roots of that polynomial,...
Forum: Programming 2021-10-11, 01:05
Replies: 24
Views: 1,595
Posted By alpertron
I think I understood your method. The contents of...

I think I understood your method. The contents of the priority queue and the sorted divisors are the following:


S1 = {1,2,4,8}, S2 = {1,3,9,27}

1,2,4,8 -> 1
3,2,4,8 -> 2
3,6,4,8 -> 3...
Forum: Programming 2021-10-10, 20:11
Replies: 24
Views: 1,595
Posted By alpertron
If you press the button Show more divisors you...

If you press the button Show more divisors you will see the divisor 7 in the second batch.

My application sorts the results inside batches.

The number 18! has 14688 divisors. The application...
Forum: Programming 2021-10-10, 17:37
Replies: 24
Views: 1,595
Posted By alpertron
I've just uploaded a new version of the Integer...

I've just uploaded a new version of the Integer Factorization Calculator (https://www.alpertron.com.ar/ECM.HTM) that includes the list of divisors. Each batch of 1000 factors is sorted using...
Forum: Programming 2021-10-08, 16:31
Replies: 24
Views: 1,595
Posted By alpertron
The algorithm posted to Stack Overflow requires...

The algorithm posted to Stack Overflow requires that all the divisors are present in memory. So it is not useful for me.

I will show unsorted divisors in my Web application. If the number of...
Forum: Programming 2021-10-05, 21:06
Replies: 24
Views: 1,595
Posted By alpertron
At this moment I have a lot of work. I will...

At this moment I have a lot of work. I will continue with this on the weekend.

Notice that the factorial of 100 was just an example. I really need to show the list of divisors of any integer...
Forum: Programming 2021-10-04, 11:21
Replies: 24
Views: 1,595
Posted By alpertron
I asked this problem in another forum and someone...

I asked this problem in another forum and someone pointed to https://stackoverflow.com/questions/29992904/enumerate-factors-of-a-number-directly-in-ascending-order-without-sorting . I will analyze...
Forum: Programming 2021-10-04, 03:15
Replies: 24
Views: 1,595
Posted By alpertron
All numbers between 1 and 100 are divisors of...

All numbers between 1 and 100 are divisors of 100! but it appears that there are missing divisors in your list.
Forum: Programming 2021-10-04, 01:24
Replies: 24
Views: 1,595
Posted By alpertron
Ok. Let's use an example: the number is 100! I...

Ok. Let's use an example: the number is 100! I know its complete factorization.

I want to show the first 1000 divisors, then the next 1000 divisors and so on.
Forum: Programming 2021-10-04, 00:56
Replies: 24
Views: 1,595
Posted By alpertron
From my first post, you can see that I cannot...

From my first post, you can see that I cannot sort the divisors.

There may be millions of divisors, but I have to generate the smallest 1000 of them. After the user presses a button, the program...
Forum: Programming 2021-10-04, 00:23
Replies: 24
Views: 1,595
Posted By alpertron
Thanks, but it does not help me. As a test,...

Thanks, but it does not help me.

As a test, I entered:


FORDIV(N)=
{ my(F = factor(N), P = F[,1], E = F[,2]);

forvec(v = vector(#E, i, [0,E[i]]), print(factorback(P, v)));
}
Forum: Programming 2021-10-03, 13:57
Replies: 24
Views: 1,595
Posted By alpertron
Computing divisors from complete factorization

I would like to generate the divisors of a number from its complete factorization in powers of prime numbers.

It is very easy to generate all of them if I do not need to be sorted, but I would...
Forum: Information & Answers 2021-09-21, 15:08
Replies: 5
Views: 843
Posted By alpertron
Furthermore, completely factor a Mersenne number...

Furthermore, completely factor a Mersenne number (if it cannot be done with trial factoring, P-1 or ECM) requires SNFS which runs a lot faster than GNFS. So factoring a n-bit Mersenne number is far...
Forum: Science & Technology 2021-09-14, 17:03
Replies: 274
Views: 24,917
Posted By alpertron
Today I received my second shot. This time was...

Today I received my second shot. This time was Moderna. On June 10th I received Sputnik.
Forum: Science & Technology 2021-08-29, 23:20
Replies: 274
Views: 24,917
Posted By alpertron
Today my 18 year old son received his first dose...

Today my 18 year old son received his first dose of Sputnik vaccine.
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