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Forum: Miscellaneous Math 2022-06-22, 16:30
Replies: 10
Views: 396
Posted By Stargate38
At the moment, the largest known perfect number...

At the moment, the largest known perfect number (unless yours is bigger) is 2^165179865-2^82589932=2^82589932*M82589933.
Forum: Factoring 2022-06-12, 16:53
Replies: 24
Views: 1,608
Posted By Stargate38
@bur: I started with 10^32-1, and the sequence...

@bur: I started with 10^32-1, and the sequence seems to be open-ended. After 160 terms, I get this number: http://www.factordb.com/index.php?id=1100000003600111633
Forum: YAFU 2022-05-30, 00:04
Replies: 399
Views: 53,278
Posted By Stargate38
Is your OS and/or CPU 32-bit or 64-bit? If it's...

Is your OS and/or CPU 32-bit or 64-bit? If it's 32-bit, no 64-bit exe will work on it.
Forum: FactorDB 2022-05-29, 23:56
Replies: 571
Views: 108,144
Posted By Stargate38
@Sweety439: For the n-th prime, you could use...

@Sweety439: For the n-th prime, you could use Pari/gp's prime(n) function, and then paste the output to the DB. The amount of time depends on n.
Forum: Factoring 2022-05-27, 21:49
Replies: 84
Views: 3,292
Posted By Stargate38
@charybdis: Why would there even be an...

@charybdis: Why would there even be an investigaton? If someone published a working, polynomial-time factoring algorithm for classical computers, that algorithm would be considered "protected speech"...
Forum: FactorDB 2022-05-27, 21:35
Replies: 571
Views: 108,144
Posted By Stargate38
I know of a reason to keep it. Since we don't...

I know of a reason to keep it. Since we don't have a built-in floor or ceiling function, we can represent it as floor(a/b)=(a-(a%b))/b, and ceil(a/b)=(a-(a%b))/b+1. We can use this to calculate...
Forum: mersenne.ca 2022-05-26, 00:43
Replies: 942
Sticky: mersenne.ca
Views: 128,273
Posted By Stargate38
Question What about p>2^32?

Please add support for TF "no factor" results 2^32<p<10^10. There are 251,772,290 prime exponents in that range, and I want to be able to see how much TF has been run on such exponents without known...
Forum: Aliquot Sequences 2022-05-09, 16:25
Replies: 678
Views: 29,769
Posted By Stargate38
1250^26 and 1250^27 both terminated by me.

1250^26 and 1250^27 both terminated by me.
Forum: And now for something completely different 2022-05-09, 15:35
Replies: 188
Views: 13,963
Posted By Stargate38
This is what happened when I tried running...

This is what happened when I tried running ecpp-mpi via "mpirun ecpp-mpi -g -n '10^1000+453' -c -f cert-1000" (The example provided in the accompanying PDF from their website):
...
Forum: And now for something completely different 2022-05-08, 23:58
Replies: 188
Views: 13,963
Posted By Stargate38
I got every package to compile in Windows Bash,...

I got every package to compile in Windows Bash, but when I run ecpp, I get "ecpp: error while loading shared libraries: libcm.so.0: cannot open shared object file: No such file or directory", and...
Forum: Miscellaneous Math 2022-05-03, 15:45
Replies: 580
Views: 76,960
Posted By Stargate38
I don't think he needs to provide valid evidence...

I don't think he needs to provide valid evidence for a prime being there. I think he might just be searching a range of his choice that's not heavily used. If I were him, I would do the same to keep...
Forum: Aliquot Sequences 2022-05-03, 15:27
Replies: 1,811
Views: 210,150
Posted By Stargate38
I would like to have my acronym be SG1, after the...

I would like to have my acronym be SG1, after the team of the same name from Stargate SG-1.

As for parity-changing sequences, I haven't found such a sequence yet, but I've run thousands of Aliquot...
Forum: Aliquot Sequences 2022-05-02, 22:30
Replies: 1,811
Views: 210,150
Posted By Stargate38
Is it possible for an even sequence to hit a...

Is it possible for an even sequence to hit a square over 100 digits, change parity, and hit another square around 20-40 digits after a few terms? I've been thinking about this for the past month, and...
Forum: Aliquot Sequences 2022-05-02, 20:07
Replies: 1,811
Views: 210,150
Posted By Stargate38
Could you please put me as the one who did 1058?...

Could you please put me as the one who did 1058? I terminated it up to i=43, and ran 1058^44 up to i6. I stopped at the C125, as I need to catch up on factoring other numbers on the DB that I had...
Forum: And now for something completely different 2022-05-01, 15:22
Replies: 57
Views: 32,060
Posted By Stargate38
Any more details on that block? Have you tried...

Any more details on that block? Have you tried appealing it, or changing your IP (i.e. reboot your router)? I'm hoping there's some way of getting you unblocked sooner.
Forum: Miscellaneous Math 2022-04-17, 17:28
Replies: 2
Views: 840
Posted By Stargate38
Primes p such that p^2+p+1=q is prime, and p is largest prime factor of q^3-1

I was wondering if there's even such a prime p that fits the following:

1. p^2+p+1=q is prime (seems that p must be of the form 6n-1, other than 2 and 3).
2. Largest prime factor of q^3-1 is p.
...
Forum: FactorDB 2022-04-12, 00:33
Replies: 571
Views: 108,144
Posted By Stargate38
It's back online now, but it's really slow, even...

It's back online now, but it's really slow, even for existing numbers: http://www.factordb.com/index.php?id=1100000003128393776 (about 4.5 seconds) or...
Forum: Science & Technology 2022-03-03, 22:06
Replies: 1,595
Views: 152,862
Posted By Stargate38
The atmospheric changes caused by nuclear war...

The atmospheric changes caused by nuclear war would cool the Earth down (i.e. nuclear winter). So, in addition to all the horrible contamination and death that would come with it, there would in fact...
Forum: FactorDB 2022-02-04, 16:16
Replies: 571
Views: 108,144
Posted By Stargate38
I had that second issue with a bunch of links in...

I had that second issue with a bunch of links in my bookmarks. Hopefully Syd will visit this forum and fix them:

http://www.factordb.com/index.php?id=1100000000921987373...
Forum: Factoring 2022-01-28, 18:16
Replies: 55
Views: 6,016
Posted By Stargate38
I just want to know the exact number that you...

I just want to know the exact number that you factored. If you want, you could PM it to me so it doesn't get into anyone else's hands. I'm very good at keeping secrets (i.e. my SSN).
Forum: Factoring 2022-01-27, 21:55
Replies: 55
Views: 6,016
Posted By Stargate38
@Lessiv: Could you please post the number (if you...

@Lessiv: Could you please post the number (if you factored it)?
Forum: FactorDB 2022-01-25, 15:51
Replies: 571
Views: 108,144
Posted By Stargate38
I've noticed that the DB has been running slow....

I've noticed that the DB has been running slow. Is someone flooding it, or is there a hardware issue?
Forum: Soap Box 2022-01-23, 17:03
Replies: 983
Views: 96,731
Posted By Stargate38
We all have our own opinions. IMO, the only guns...

We all have our own opinions. IMO, the only guns that could kill people are autonomous robotic weapons with AI (i.e. real-world equivalents of droid weapons). All other guns need a person to pull the...
Forum: Soap Box 2022-01-23, 16:28
Replies: 983
Views: 96,731
Posted By Stargate38
Why are you so against guns? Seriously, there are...

Why are you so against guns? Seriously, there are numerous other things that can be used lethal weapons, as I mentioned in my last post. Banning guns would NOT solve the problem, as people would go...
Forum: Miscellaneous Math 2022-01-23, 16:20
Replies: 17
Views: 1,786
Posted By Stargate38
Don't forget -31+6i, -31-6i, 6+31i, 6-31i,...

Don't forget -31+6i, -31-6i, 6+31i, 6-31i, -6+31i, and -6-31i.
Showing results 1 to 25 of 708

 
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