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Forum: kriesel 2021-01-13, 23:25
Replies: 27
Views: 8,472
Posted By kriesel
Performance variables for gpuowl

At least the following, to varying degrees:

The gpu model has a great deal of effect. Radeon VII or RX6x00 preferred for performance/cost ratio. See https://www.mersenne.ca/cudalucas.php

OS...
Forum: kriesel 2021-01-13, 16:34
Replies: 14
Views: 4,753
Posted By kriesel
Windows Subsystem for Linux (WSL)

early draft, maybe becomes a whole thread


Requirements:
64-bit hardware supported by Windows
WSL1: Windows 10 x64 v1607 or later per https://www.computerhope.com/issues/ch001879.htm
WSL2:...
Forum: kriesel 2021-01-03, 19:08
Replies: 14
Views: 4,753
Posted By kriesel
Donations

To donate to mersenne.org (https://www.mersenne.org/):
https://www.mersenne.org/donate/ via paypal or mail https://www.mersenneforum.org/showpost.php?p=516111&postcount=1...
Forum: kriesel 2020-12-30, 15:19
Replies: 1
Views: 140
Posted By kriesel
Installation

The 7120A device is a dual-slot PCIe card requiring up to 300W; 75W from the PCIe socket, 75W from a 6-pin power connector, and 150W from an 8pin power connector. At idle, the 7120A PCIe...
Forum: kriesel 2020-12-30, 02:55
Replies: 1
Views: 140
Posted By kriesel
Knight's Corner PCIe 7120A Coprocessor

This thread is intended as a reference thread for Mersenne exponents of special forms. For discussion, please use the reference discussion thread...
Forum: kriesel 2020-12-30, 00:16
Replies: 0
Views: 74
Posted By kriesel
Xeon Phi

This is intended as a reference thread. Do not post here. Post comments at https://www.mersenneforum.org/showthread.php?t=23383 instead. Posts placed here may be moved or deleted without warning or...
Forum: kriesel 2020-12-24, 21:23
Replies: 6
Views: 191
Posted By kriesel
Personally significant dates encoded into exponents

The idea of encoding personally significant dates into exponents came up in https://www.mersenneforum.org/showpost.php?p=549304&postcount=8 and has no more mathematical merit than trying to pick a...
Forum: kriesel 2020-12-24, 18:18
Replies: 6
Views: 191
Posted By kriesel
Prime approximations of round multiples of irrational numbers

Consider r = c x 10n x b, where b is an irrational number such as pi, e, sqrt(2), sqrt(3), sqrt(5), sqrt(10), etc and where c, n are are small positive integers chosen such that 108< r < 109. And...
Forum: kriesel 2020-12-24, 18:10
Replies: 6
Views: 191
Posted By kriesel
Palindromic numbers as exponents

Palindromic numbers (https://en.wikipedia.org/wiki/Palindromic_number) are numbers that are reversible digit by digit without changing value. 110505011 is an example, which as a Mersenne exponent, ...
Forum: kriesel 2020-12-24, 18:07
Replies: 6
Views: 191
Posted By kriesel
Repdigits and near-repdigits

Repdigits (https://en.wikipedia.org/wiki/Repdigit) are numbers consisting only of repetition of the same digit value. (Single-digit numbers are excluded by definition.)

For Mersennes' exponents,...
Forum: kriesel 2020-12-24, 18:00
Replies: 6
Views: 191
Posted By kriesel
Straights

These are exponents such as 160456789 which also sometimes come up in dubious claims or guesses as exponents of Mersenne primes (https://www.mersenneforum.org/showpost.php?p=548628&postcount=20). In...
Forum: kriesel 2020-12-24, 17:56
Replies: 6
Views: 191
Posted By kriesel
Mersenne rhymes

As used here, a rhyme is an exponent that has in common several rightmost digits with another, in the same order. Rhymes in one number base likely will not be rhymes in most others, or only to...
Forum: kriesel 2020-12-24, 17:51
Replies: 6
Views: 191
Posted By kriesel
Exponents of particular forms

This thread is intended as a reference thread for Mersenne exponents of special forms. For discussion, please use the reference discussion thread...
Forum: kriesel 2020-12-16, 17:25
Replies: 18
Views: 4,757
Posted By kriesel
Why don't we use 2 instead of 3 as the base for PRP or P-1 computations?

Mersenne numbers are base-2 pseudoprimes. All would be indicated as prime in P-1 factoring or Fermat PRP tests, whether actually prime or composite. Using 3 as the base provides useful information,...
Forum: Math 2020-12-16, 16:37
Replies: 16
Views: 561
Posted By kriesel
No one responded to the OP for hours. While I was...

No one responded to the OP for hours. While I was trying to help, and understand/remember myself, researching an answer, and composing, previewing, and formatting one...
Forum: Cloud Computing 2020-12-16, 16:16
Replies: 1,122
Views: 74,056
Posted By kriesel
Yes. All GIMPS computation types are possible...

Yes. All GIMPS computation types are possible there on either cpu or gpu. But, latency can be a problem. Expiration can be a problem for wavefront primality first tests or higher. And CUDAPm1 did not...
Forum: Marin's Mersenne-aries 2020-12-16, 15:16
Replies: 888
Views: 55,672
Posted By kriesel
Took / registered following, ETA 5 and 10 days...

Took / registered following, ETA 5 and 10 days respectively, assuming 24/7 running:
Cat 2
Doublecheck=56431363,74,1
Doublecheck=56495983,74,1 Also took, registered, following, ETA ~4 days for...
Forum: Math 2020-12-16, 11:59
Replies: 16
Views: 561
Posted By kriesel
Quoting was sufficient. Over time, patterns...

Quoting was sufficient. Over time, patterns emerge. There are some on the forum whose contributions are quite commonly cynical or critical and not so commonly constructive or enlightening. The...
Forum: ONeil 2020-12-16, 09:45
Replies: 84
Views: 1,559
Posted By kriesel
And engineering made the benefits from all those...

And engineering made the benefits from all those fields not merely possible, but practical and economical and so widespread.
Forum: Math 2020-12-15, 21:28
Replies: 16
Views: 561
Posted By kriesel
Instead of criticizing from the stands, try...

Instead of criticizing from the stands, try entering the arena. "It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done...
Forum: Lounge 2020-12-15, 14:37
Replies: 8
Views: 478
Posted By kriesel
The last 25 years has been more fruitful for...

The last 25 years has been more fruitful for Mersenne prime finding, than any other similar length time span in history. There have been centuries with no finds. https://www.mersenne.org/primes/
Forum: Math 2020-12-15, 01:30
Replies: 16
Views: 561
Posted By kriesel
E is not just the product of the primes < B1,...

E is not just the product of the primes < B1, it's the product of maximum integral powers of each prime fitting < B1 individually, called powersmooth.
The exponentiation aE*2*p is done mod Mp. So...
Forum: News 2020-12-15, 00:31
Replies: 321
Views: 41,010
Posted By kriesel
Welcome to the forum. You might find some useful...

Welcome to the forum. You might find some useful background at https://www.mersenneforum.org/showthread.php?p=521922#post521922

404 error on that.

prime95 disk requirements for prp & proof...
Forum: Marin's Mersenne-aries 2020-12-14, 22:42
Replies: 888
Views: 55,672
Posted By kriesel
Thanks/whew/sorry Dmitry. Took, and...

Thanks/whew/sorry Dmitry.

Took, and reserved, with ETA ~5 days:
Cat 2
Doublecheck=56380757,74,1
Doublecheck=56500573,74,1 Also, from cat3, reserved
Doublecheck=56605457,74,1...
Forum: GpuOwl 2020-12-14, 21:11
Replies: 73
Views: 6,041
Posted By kriesel
Intel and NVIDIA trading places

Had gpuowl running on the gtx1080 as device 0 in gpuowl v6.11-380-device <N> : select a specific device:
0 : GeForce GTX 1080- not-AMD
1 : Intel(R) HD Graphics- not-AMD
2 : Intel(R)...
Showing results 1 to 25 of 1000

 
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