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Search: Posts Made By: JCoveiro
Forum: Software 2022-02-21, 16:03
Replies: 736
Views: 68,142
Posted By JCoveiro
Hi. Yep, I can volunteer. 3990X + 6900XT

Hi. Yep, I can volunteer.

3990X + 6900XT
Forum: Wagstaff PRP Search 2022-02-09, 22:26
Replies: 10
Views: 12,271
Posted By JCoveiro
t3(q)={s=4;for(i=2,q,s=(s^2-2)%(6*(2^q+1)/3));s=(s...

t3(q)={s=4;for(i=2,q,s=(s^2-2)%(6*(2^q+1)/3));s=(s-14)%(2^(q-2)-2);if(s==0,print1(q","))}
forprime(x=3,5000,t3(x))

5,7,11,13,17,19,23,31,43,61,79,101,127,167,191,199,313,347,701,1709,2617,3539,
Forum: Wagstaff PRP Search 2022-02-09, 01:54
Replies: 20
Views: 6,253
Posted By JCoveiro
more simplifications (2)

t3(q)={w=(2^q+1)/3;s=4;for(i=2,q,s=(s^2-2)%(6*w));if(ispowerful(s+2),print1(q","))}
forprime(x=1,1000,t3(x))

3,5,7,11,13,17,19,23,31,43,61,79,101,127,167,191,199,313,347,701,

or
...
Forum: Wagstaff PRP Search 2022-02-09, 01:28
Replies: 20
Views: 6,253
Posted By JCoveiro
Thumbs up more wagstaff simplifications

t3(q)={w=(2^q+1)/3;s=4;for(i=1,q,s=(s^2-2)%(6*w););if(s==14||s==194,print1(q","))}
forprime(x=1,100000,t3(x))

3,5,7,11,13,17,19,23,31,43,61,79,101,127,167,191,199,313,347,701,1709,2617,3539,
Forum: Wagstaff PRP Search 2022-02-08, 16:08
Replies: 20
Views: 6,253
Posted By JCoveiro
what if?

t(q)={w=(2^q+1)/3;s=4;for(i=1,q-1,s=(s^2-2)%(w));s1=lift(Mod(s-5-9,w));s2=lift(Mod(s-5+9,w));if((s1==0)||(s2==0),print1(q","))}
forprime(x=3,5000,t(x))
...
Forum: Wagstaff PRP Search 2022-02-08, 16:04
Replies: 20
Views: 6,253
Posted By JCoveiro
more fixes in wagstaff

t3(q)={w=(2^q+1)/3;s=4;for(i=1,q-1,s=(s^2-2)%(w));s1=lift(Mod(s-5-9,w));s2=lift(Mod(s-5+9,w));if((s1==0)||(s2==0),print1(q","))}
forprime(x=3,5000,t3(x))
...
Forum: Wagstaff PRP Search 2022-02-08, 15:23
Replies: 20
Views: 6,253
Posted By JCoveiro
Thumbs up fix

For Mersenne:

t1(q)={w=(2^q-1);S0=4;S=S0;for(i=1,q-1,S=Mod(S^2-2,w));s1=lift(Mod(S-5-9,w));s2=lift(Mod(S-5+9,w));if(s2==2,print1(q","))}
forprime(x=3,5000,t1(x))
...
Forum: Number Theory Discussion Group 2022-02-08, 14:43
Replies: 2
Views: 797
Posted By JCoveiro
also2

Numbers:
3,11,23,191,3539,10691,83339,4031399,13347311
can be generated by: isprime(2*p+1)&&(p%4==3)

And numbers:
5,89,9689,21701,859433,43112609
can be generated by: isprime(2*p+1)&&(p%4==1)
Forum: Number Theory Discussion Group 2022-02-08, 14:13
Replies: 2
Views: 797
Posted By JCoveiro
also

Also:

If (2*p+1) | Mersenne(p) then: Wagstaff(p) might be a prime.

3,11,23,191,3539,10691,83339,4031399,13347311

and

If (2*p+1) | Wagstaff(p) then: Mersenne(p) might be a prime.
Forum: Number Theory Discussion Group 2022-02-06, 19:22
Replies: 2
Views: 797
Posted By JCoveiro
Sophie Germain Primes, Mersenne numbers and Wagstaff numbers Connection

Hi all.

I think I've found a "Sophie Germain Primes" connection with Mersenne numbers and Wagstaff numbers.

k=1;forprime(x=1,1000,if(isprime(2*x+1),print1("SophieGermain("k")*2+1 = ("x"*2+1) =...
Forum: Marin's Mersenne-aries 2022-01-28, 16:02
Replies: 44
Views: 5,131
Posted By JCoveiro
hi

Hi Kriesel.

Can I help with double-checks?
Forum: Hardware 2022-01-27, 21:37
Replies: 136
Views: 24,749
Posted By JCoveiro
6900XT (other benchmarks)

6900XT


2022-01-27 21:21:02 gpuowl v6.11-380-g79ea0cc
2022-01-27 21:21:04 gfx1030-0 OpenCL compilation in 2.55 s
2022-01-27 21:21:07 gfx1030-0 77936867 OK 800 0.00%; 613 us/it; ETA 0d...
Forum: Hardware 2022-01-27, 21:16
Replies: 136
Views: 24,749
Posted By JCoveiro
6900XT (Benchmarks)

Hi again.

I'm sending the 6900XT Benchmarks (from your file).
Forum: Hardware 2022-01-27, 18:50
Replies: 136
Views: 24,749
Posted By JCoveiro
6900XT

Hi all. I do also have a 6900XT.
Do you still need any benchmarks?
Forum: Hardware 2022-01-14, 17:30
Replies: 877
Views: 219,148
Posted By JCoveiro
Forum: Hardware 2022-01-14, 09:41
Replies: 27
Views: 8,885
Posted By JCoveiro
3990x

Posted some benchmarks on: Perpetual benchmark thread...
Forum: Hardware 2022-01-14, 09:30
Replies: 877
Views: 219,148
Posted By JCoveiro
3990X (PBO disabled)

64 cores, 8 workers | win11 pro

AMD Ryzen Threadripper 3990X 64-Core Processor
CPU speed: 4217.15 MHz, 64 hyperthreaded cores
CPU features: 3DNow! Prefetch, SSE, SSE2, SSE4, AVX, AVX2, FMA
L1...
Forum: Hardware 2022-01-13, 16:19
Replies: 27
Views: 8,885
Posted By JCoveiro
True. I've been testing and 8 workers gives...

True.
I've been testing and 8 workers gives the best timings.
Also in Linux seems faster. Currently I'm using Win11 Pro.
Forum: Hardware 2022-01-13, 00:23
Replies: 27
Views: 8,885
Posted By JCoveiro
AMD 3990x + AMD RX 6900XT

Hi people.

Just made a new build today: 3990x + RX 6900XT
Still tuning the system and doing some experiments.
If you want I can run some tests and benchmarks.

Thanks,
Jorge Coveiro.
Forum: Software 2021-10-07, 17:07
Replies: 227
Views: 37,588
Posted By JCoveiro
[UPDATE]: Performance bad again on a restart,...

[UPDATE]: Performance bad again on a restart, around 5,750ms/iter
Forum: Software 2021-10-07, 16:49
Replies: 227
Views: 37,588
Posted By JCoveiro
Build 3 solved partially my windows11pro...

Build 3 solved partially my windows11pro performance issues.

But it is still slower when I stop and restart Prime95.

If I do a fresh boot up of my machine it gives around 2,850ms/iter.
But if...
Forum: Marin's Mersenne-aries 2021-09-29, 09:45
Replies: 136
Views: 17,581
Posted By JCoveiro
Hi people. Which exponents are left to...

Hi people.

Which exponents are left to verify M48?

I can help in double-checking.
Forum: JCoveiro 2020-02-05, 18:51
Replies: 12
Views: 21,336
Posted By JCoveiro
Thumbs up :chalsall::tu:

:chalsall::tu:
Forum: Teams 2020-02-05, 15:45
Replies: 2
Views: 12,632
Posted By JCoveiro
Any active Team?

Is there any 'active' Team?
I would like to join one.
Forum: No Prime Left Behind 2020-02-05, 15:29
Replies: 299
Views: 63,776
Posted By JCoveiro
Hi AMDave! These "teams" are for researching...

Hi AMDave!

These "teams" are for researching only Mersenne Primes?
Or also other kinds of primes?!
Showing results 1 to 25 of 48

 
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