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Forum: kriesel 2020-11-27, 15:01
Replies: 5
Views: 1,887
Posted By kriesel
Mlucas builds for Windows

Building for Windows in msys2 is similar to building for Linux or WSL, except:
remove -DUSE_THREADS and -lpthread for Windows single-threaded end use.
How I built or attempted in msys2 for Windows...
Forum: PrimeNet 2020-11-27, 14:30
Replies: 12
Views: 223
Posted By kriesel
Climbing the learning curve can provide many...

Climbing the learning curve can provide many hours of enjoyable distraction.
Start through https://www.mersenneforum.org/showthread.php?t=24607. Bookmark it for later reference.
For software after...
Forum: PrimeNet 2020-11-27, 14:13
Replies: 12
Views: 223
Posted By kriesel
FOUR known factors, known for 15 to 39 years....

FOUR known factors, known for 15 to 39 years. Mfactor can find the smallest in under a minute on one core of an old slow Xeon E5645.
Searching in the interval k=[0, 16336320]
Each of 16 (p mod 60)...
Forum: PrimeNet 2020-11-27, 03:49
Replies: 12
Views: 223
Posted By kriesel
What's the exponent? What's the reason?...

What's the exponent? What's the reason? (Hopefully not "My social security number or bank account number is prime so I wondered about the corresponding Mersenne number")
Forum: PrimeNet 2020-11-27, 02:57
Replies: 12
Views: 223
Posted By kriesel
To expand on Viliam's point about the exponent...

To expand on Viliam's point about the exponent being prime: if the exponent is composite, the corresponding Mersenne number has trivially found factors and so is composite. In that case none of the...
Forum: Hardware 2020-11-26, 13:59
Replies: 121
Views: 6,244
Posted By kriesel
When I was an apartment dweller, it was common...

When I was an apartment dweller, it was common that a cable guy futzing in the wire closet to hook up a new account would hose an existing account's connection (mine). More recently, a township...
Forum: Software 2020-11-26, 06:56
Replies: 29
Views: 4,636
Posted By kriesel
Preceding post's output error occurs in...

Preceding post's output error occurs in results.txt but not console output. Don't know if that's due to Ernst's source or some wayward edit at my location.


Due to typos or batch script editing...
Forum: Miscellaneous Math 2020-11-26, 06:10
Replies: 4
Views: 107
Posted By kriesel
How does one get a suspected 26-megadigit prime...

How does one get a suspected 26-megadigit prime from RSA, which commonly uses keys in the 1024-bit to 4096-bit range? Especially in 2011, when 512-bit were apparently successfully attacked by...
Forum: Software 2020-11-25, 21:43
Replies: 29
Views: 4,636
Posted By kriesel
output bug with -mm n input

Searching in the interval k=[0, 16336320]
Each of 16 (p mod 60) passes will consist of 1 intervals of length 272272

Factor with k = 68745. This factor is a probable prime.
M(31) has 1...
Forum: Hardware 2020-11-25, 21:03
Replies: 121
Views: 6,244
Posted By kriesel
Sheesh, run the long cable, or temporarily...

Sheesh, run the long cable, or temporarily relocate the box. There are better uses for your time than battling wifi install on a case with 2 or 3 RJ45s, such as proving out F33 P-1 code or producing...
Forum: PrimeNet 2020-11-25, 20:44
Replies: 66
Views: 7,440
Posted By kriesel
You could try bumping the final bit level up to...

You could try bumping the final bit level up to 76. It needs to go there anyway. You'll get credit for the 74-75 and the 75-76, which is 6 parts out of 7of the work effort from 73 bits per exponent,...
Forum: Miscellaneous Math 2020-11-25, 19:43
Replies: 18
Views: 324
Posted By kriesel
First, study the subject. Learn the applicable...

First, study the subject. Learn the applicable number theory, and the relevant software offerings and their capabilities and limitations.

~10300000000+ small N ~2996,578,429-c. If c= 1, it's a...
Forum: Lounge 2020-11-25, 13:46
Replies: 145
Views: 16,855
Posted By kriesel
There is a known 42 bit factor for M13,029,749,...

There is a known 42 bit factor for M13,029,749, with trivially small P-1 bounds sufficient, or very brief TF. https://www.mersenne.ca/exponent/13029749
Oliver Kruse's PRP run in progress is a waste...
Forum: GpuOwl 2020-11-25, 05:21
Replies: 23
Views: 2,784
Posted By kriesel
gpuowl-win v7.2-21-g28dbf88

As usual, build-log.txt separate, everything else in the compressed file.
Forum: Science & Technology 2020-11-25, 01:26
Replies: 38
Views: 759
Posted By kriesel
Tuck the nose cone tip of one into an engine...

Tuck the nose cone tip of one into an engine nozzle of the next, to accommodate a few otherwise excess meters. https://en.wikipedia.org/wiki/Rocketdyne_F-1...
Forum: Science & Technology 2020-11-22, 14:10
Replies: 38
Views: 759
Posted By kriesel
That "call-back" was way earlier than reasonable...

That "call-back" was way earlier than reasonable to expect, unless assuming a nearby listening post.
Forum: Science & Technology 2020-11-21, 02:51
Replies: 38
Views: 759
Posted By kriesel
Quick, give the complete correlated load and...

Quick, give the complete correlated load and corrosion history of every portion of the structure, in ANSYS input compatible form.

...
Forum: GPU Computing 2020-11-21, 02:40
Replies: 88
Views: 18,866
Posted By kriesel
Look for patterns to the fails. If they're all...

Look for patterns to the fails. If they're all above 80 bits, it could perhaps be used in the 70s.
Forum: Hardware 2020-11-20, 23:06
Replies: 121
Views: 6,244
Posted By kriesel
Manual says there's a pad pair to short with a...

Manual says there's a pad pair to short with a screwdriver blade with power off.
Forum: Hardware 2020-11-20, 23:04
Replies: 121
Views: 6,244
Posted By kriesel
Don't know. There may be a reason why it was...

Don't know. There may be a reason why it was hidden away like that. Trace if possible. Or get something like...
Forum: Lounge 2020-11-20, 15:50
Replies: 4,137
Views: 264,462
Posted By kriesel
Thanks for prepaying your first 3 months and last...

Thanks for prepaying your first 3 months and last month. (Deposit is for damages first, then any remainder to unpaid rent.) If you would like to prepay half or all the rest of the year lease when...
Forum: kriesel 2020-11-19, 22:32
Replies: 5
Views: 1,887
Posted By kriesel
Mlucas builds for Linux (or for running on WSL on Windows)

How I built Mlucas in WSL2 / Ubuntu 18.04 for multiple processor types
(rename the executable between builds to identify the flavor)
Note these are mostly untested.

basic x86-64, & presumably...
Forum: Hardware 2020-11-19, 21:48
Replies: 121
Views: 6,244
Posted By kriesel
Unplug, open case, check JF1...

Unplug, open case, check JF1 (https://www.mersenneforum.org/showpost.php?p=563263&postcount=62) by the main motherboard 24-pin power connector. I had the same won't-start issue after a Windows...
Forum: Lounge 2020-11-19, 16:28
Replies: 4,137
Views: 264,462
Posted By kriesel
Ah yes, that worked well when physical paper...

Ah yes, that worked well when physical paper checks were endorsed and stamped and returned to the writer after having served their purpose. Mailing a check, the effective payment date was often that...
Forum: FermatSearch 2020-11-19, 15:50
Replies: 58
Views: 2,679
Posted By kriesel
Sure, write me some error free code that runs in...

Sure, write me some error free code that runs in O(ln(n)) or faster and I'll try it.
The odds of n being prime ~1/ln(n), are very much against your assertion of primality for MMp51*.

Now could we...
Showing results 1 to 25 of 1000

 
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