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Search took 0.06 seconds. Search: Posts Made By: Viliam Furik
Forum: Viliam Furik 2021-04-11, 16:06
Replies: 14
Views: 380
Posted By Viliam Furik
Update

I have been trying to find something and came across the Wikipedia page for the LL test, where it says, that the sign of the S(p-3) is (-1)(p-1)/2 (except for p = 5), for starting value of 2/3, which...
Forum: Prime Gap Searches 2021-04-07, 21:23
Replies: 3
Views: 143
Posted By Viliam Furik
Yes, there is (quite unfortunately) only one...

Yes, there is (quite unfortunately) only one mathematics oriented Matt Parker.

I especially recommend his previous book "Things to make and do in the 4th dimension". It covers a lot of interesting...
Forum: Marin's Mersenne-aries 2021-04-04, 22:12
Replies: 147
Views: 11,499
Posted By Viliam Furik
It seems that ATH was faster than you...

It seems that ATH was faster than you...
Forum: Marin's Mersenne-aries 2021-04-04, 18:15
Replies: 147
Views: 11,499
Posted By Viliam Furik
I have recently started doing a lot of P-1 on...

I have recently started doing a lot of P-1 on factored exponents in under 10M ranges. So far 121 factors after 3 weeks, not bad.

I've been checking the progress of PRP-CF on these factors, and...
Forum: PrimeNet 2021-04-03, 18:18
Replies: 11
Views: 352
Posted By Viliam Furik
:lol: But also 7 lefts, or 11 lefts, or any...

:lol: But also 7 lefts, or 11 lefts, or any amount of lefts of the form 4k+3, with k being from the set N0.
Forum: GpuOwl 2021-04-03, 18:13
Replies: 16
Views: 709
Posted By Viliam Furik
Yes, that's true, but there is an easy solution....

Yes, that's true, but there is an easy solution. Replace the 2^p-1 with "gpuOwl", and put it under the owl. Or remove the text completely. There are many possibilities.
Forum: GpuOwl 2021-04-03, 15:42
Replies: 16
Views: 709
Posted By Viliam Furik
Together with a friend, I have designed a...

Together with a friend, I have designed a competitor logo. We also have an SVG file. Please, let me know how you like it.
Forum: PrimeNet 2021-04-02, 18:50
Replies: 11
Views: 352
Posted By Viliam Furik
Yes, it will be accepted, and because it's a...

Yes, it will be accepted, and because it's a different assignment type, PRP instead of LL, the exponent will be closed by certification for good.
Forum: Hardware 2021-03-31, 08:18
Replies: 90
Views: 13,165
Posted By Viliam Furik
I think there is no simple improvement available,...

I think there is no simple improvement available, only the extreme and risky ones, such as delidding the CPU - removing the heat spreader (yes, correct name, IHS - integrated HS is even more correct)...
Forum: LaurV 2021-03-30, 18:45
Replies: 14
Views: 319
Posted By Viliam Furik
I like the smell of printed books, on the light...

I like the smell of printed books, on the light book paper, and also fresh print on the coated magazine paper.
Forum: Miscellaneous Math 2021-03-26, 23:03
Replies: 71
Views: 2,787
Posted By Viliam Furik
As far as his profile on the forum says, he lives...

As far as his profile on the forum says, he lives in Hong Kong, so you are probably wrong about the timezone in one way. You are also (this one is for sure) wrong about the timezone in another way....
Forum: Science & Technology 2021-03-25, 19:18
Replies: 2,886
Views: 215,389
Posted By Viliam Furik
I think the author of the article meant it as...

I think the author of the article meant it as "First Lady (to the President/Nobel prize winners)", an often forgotten person. The wording also indicates this, because otherwise "First Woman" would be...
Forum: PrimeNet 2021-03-25, 10:13
Replies: 9
Views: 294
Posted By Viliam Furik
This might be just a coincidence because there...

This might be just a coincidence because there are only 200 Cat 0 exponents at all times, so it's possible that all were assigned, and one of them suddenly expired or was unassigned, so it became...
Forum: Factoring 2021-03-24, 13:07
Replies: 12
Views: 575
Posted By Viliam Furik
Yes, you can run the P-1 with a higher B1, but...

Yes, you can run the P-1 with a higher B1, but often there was no P-1 done on already factored exponents because most of them have tiny factors, which were swept through long ago.


Some of them...
Forum: Hardware 2021-03-23, 18:59
Replies: 1
Views: 97
Posted By Viliam Furik
The current FTC wavefront takes up about 44 MiB...

The current FTC wavefront takes up about 44 MiB (mebibytes - basically megabytes, but counted in base 2, so it's 220 bytes, instead of 106) of L3 cache.
You can calculate the usage with this rule:...
Forum: Factoring 2021-03-23, 18:51
Replies: 12
Views: 575
Posted By Viliam Furik
A few weeks ago I have asked James for a tool...

A few weeks ago I have asked James for a tool that's meant for exactly this purpose. You can find it here (https://www.mersenne.ca/morefactors.php). Discussion about the tool can be found in the...
Forum: Viliam Furik 2021-03-22, 17:18
Replies: 14
Views: 380
Posted By Viliam Furik
The pattern you observed is fairly trivial I...

The pattern you observed is fairly trivial I would say. If the prime exponent you're testing modulo p is itself a Mersenne prime, then you are testing the Mersenne prime with a smaller exponent. For...
Forum: Viliam Furik 2021-03-22, 17:12
Replies: 14
Views: 380
Posted By Viliam Furik
:jokedrum: Good one. :D

:jokedrum:

Good one. :D
Forum: Viliam Furik 2021-03-22, 14:41
Replies: 14
Views: 380
Posted By Viliam Furik
I think you confuse yourself with small and big...

I think you confuse yourself with small and big p/P.

S(P-2) is of no use to anyone, because P = 2^p-1. 2^P-1 is a pretty big number...

Could you please recalculate and rewrite? I think it's...
Forum: Viliam Furik 2021-03-22, 00:30
Replies: 14
Views: 380
Posted By Viliam Furik
What I want is to know whether there is some rule...

What I want is to know whether there is some rule for the value of X mod p. If we knew what would the remainder of X modulo p have to be assuming Mp is prime, then this would allow testing Mersenne...
Forum: Viliam Furik 2021-03-21, 15:53
Replies: 14
Views: 380
Posted By Viliam Furik
I agree it was not stated correctly. So let me...

I agree it was not stated correctly. So let me correct myself:

S(p-2) is congruent to X (mod p)

In the case of p = 5, X is congruent to 4 (mod p), which holds, because S(p-2) is also congruent...
Forum: Viliam Furik 2021-03-21, 15:06
Replies: 14
Views: 380
Posted By Viliam Furik
Maybe useless but still interesting thing about LL sequence terms

I was thinking about testing Mersenne numbers, not modulo Mp but modulo p. I realized that since Mp is prime if and only if S(p-2) in LL sequence is 0 (mod Mp), then we know the S(p-2) = X * Mp,...
Forum: Lounge 2021-03-19, 13:02
Replies: 107
Views: 5,006
Posted By Viliam Furik
The house looks like it's been empty for at least...

The house looks like it's been empty for at least a decade and slowly decaying since, but I guess the damage was done overnight, and there were people happily living in there a week ago. It's...
Forum: mersenne.ca 2021-03-17, 20:24
Replies: 597
Sticky: mersenne.ca
Views: 66,706
Posted By Viliam Furik
A fellow Slovak GIMPS-er Anton Repko asked me to...

A fellow Slovak GIMPS-er Anton Repko asked me to post his program, so here it is.
Forum: Miscellaneous Math 2021-03-16, 21:51
Replies: 7
Views: 269
Posted By Viliam Furik
The top green row is k values. The green "c"...

The top green row is k values.
The green "c" column is the values of w.
Column "B" is LW values.

If we apply Margaret's sieve to the value of k = 5, 7, 11, 13 .... it can be clearly determined...
Showing results 1 to 25 of 442
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