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Search: Posts Made By: axn
Forum: Software 2020-08-14, 09:55
Replies: 73
Sticky: Prime95 v30.3
Views: 2,354
Posted By axn
All json entries have a timestamp field in it...

All json entries have a timestamp field in it (UTC). This is also a standard format, independent of any locale-specific settings.
Forum: Lounge 2020-08-13, 05:17
Replies: 1,597
Views: 76,900
Posted By axn
... as opposed to natural economy of...

... as opposed to natural economy of multiplication ?!



:groan:
Forum: Software 2020-08-11, 11:54
Replies: 5
Views: 166
Posted By axn
The autobenchmark doesn't run everyday. Once it...

The autobenchmark doesn't run everyday. Once it has gathered sufficient number (10?) of benchmarks for a given FFT size, the benchmarks will stop (until test requiring a new FFT size is received).
...
Forum: Cloud Computing 2020-08-10, 05:28
Replies: 1,009
Views: 45,041
Posted By axn
Yes, they fixed that within a day or so.

Yes, they fixed that within a day or so.
Forum: Wagstaff PRP Search 2020-08-09, 03:02
Replies: 386
Views: 33,801
Posted By axn
176k-177k

2^176021+1 = 33983817171714707083
2^176047+1 = 147239857768207753
2^176081+1 = 8800538544431775377603
2^176087+1 = 10673216986920486596130931
2^176089+1 = 203380380311264969
2^176161+1 =...
Forum: GPU Computing 2020-08-06, 05:23
Replies: 10
Views: 517
Posted By axn
For toe-dipping, entry level brand new GTX 1650...

For toe-dipping, entry level brand new GTX 1650 would be the better value. The performance difference (absolute and power efficiency) in mfaktc between 10xx & 16xx is no joke.
Forum: Puzzles 2020-08-05, 16:47
Replies: 27
Views: 961
Posted By axn
LOL. More like too dumb, too slow :smile: ...

LOL. More like too dumb, too slow :smile:

BTW, Interested in the your problem and solution approach.
Forum: Lounge 2020-08-05, 09:42
Replies: 3,986
Views: 236,274
Posted By axn
Real air vehicles have curves.

Real air vehicles have curves.
Forum: Puzzles 2020-08-05, 09:39
Replies: 27
Views: 961
Posted By axn
136110417:717547 173564051:717463

136110417:717547
173564051:717463
Forum: Puzzles 2020-08-05, 08:14
Replies: 27
Views: 961
Posted By axn
Minor improvements from brute force: ...

Minor improvements from brute force:
27275863:717813
93899447:717739
Forum: Puzzles 2020-08-03, 13:24
Replies: 27
Views: 961
Posted By axn
Iterating thru all odd numbers, starting from 3, ...

Iterating thru all odd numbers, starting from 3,
3:720673
9:720566
21:720169
59:720143
89:719926
127:719857
237:719477
261:719250
817:719025
Forum: Miscellaneous Math 2020-08-02, 16:47
Replies: 14
Views: 265
Posted By axn
Let's take m=1000 so we have the largest search...

Let's take m=1000 so we have the largest search space.

When N is about 1e5 bits, the first n that satisfies m*n > b is n_min~=4500, and b_max ~=4.5 million

When N is about 1e6 bits, it is n_min...
Forum: Miscellaneous Math 2020-08-02, 06:40
Replies: 14
Views: 265
Posted By axn
Ah! You're thinking 99% as an exact number,...

Ah! You're thinking 99% as an exact number, whereas I'm pretty sure OP intended to give the general flavor of the structure of the number. Meaning, b^n part is the dominant term.
Forum: Miscellaneous Math 2020-08-02, 06:38
Replies: 14
Views: 265
Posted By axn
That still leaves surprisingly large search...

That still leaves surprisingly large search space.

How big is N? Less than 1000 bits? More than million bits?

How small is m? Less than 1000? More than million?
Forum: Miscellaneous Math 2020-08-02, 06:05
Replies: 14
Views: 265
Posted By axn
"Size of N" is the digit length of N, which is...

"Size of N" is the digit length of N, which is basically O(log(N))
Forum: Miscellaneous Math 2020-08-02, 06:03
Replies: 14
Views: 265
Posted By axn
Sure, b can be composite. But a composite b must...

Sure, b can be composite. But a composite b must also pass a prime b check as a necessary condition.

For example, consider N=7*6^100+11. It will pass the b=2 check.

? N=7*6^100+11;
?...
Forum: Miscellaneous Math 2020-08-02, 02:23
Replies: 14
Views: 265
Posted By axn
That will not probably work. Due to the presence...

That will not probably work. Due to the presence of k, a large range of b's will be perfectly plausible for any given n.

I think we can slightly optimize the previous b-based approach to only look...
Forum: Miscellaneous Math 2020-08-01, 17:51
Replies: 14
Views: 265
Posted By axn
You have to start with b^k > |c| and check both...

You have to start with b^k > |c| and check both N%b^k and N%b^(k+1) are the same. Of course, without any size limits on b or c, this is going to take forever to rule out all potential b's.

If b &...
Forum: Factoring 2020-07-30, 10:14
Replies: 8
Views: 305
Posted By axn
Correct. Technically each curve has the same...

Correct. Technically each curve has the same chance of success, if there is a factor of appropriate size there to be found. But our apriori probability that there is such a factor gets lowered, every...
Forum: PARI/GP 2020-07-30, 09:54
Replies: 12
Views: 431
Posted By axn
No. You give a real valued expression in one...

No. You give a real valued expression in one variable, and it will find one real-valued solution where the expression becomes zero. So you recast your equation as 2^x-8=0 and just give the left side...
Forum: PARI/GP 2020-07-30, 07:52
Replies: 12
Views: 431
Posted By axn
? ?solve solve(X=a,b,expr): real root of...

? ?solve
solve(X=a,b,expr): real root of expression expr (X between a and b), where expr(a)*expr(b)<=0.

Your sample equation boils down to 2^x+1=0, which doesn't have real roots. Let's try with...
Forum: PrimeNet 2020-07-28, 17:03
Replies: 16
Views: 537
Posted By axn
... and the result will most likely be garbage.

... and the result will most likely be garbage.
Forum: Wagstaff PRP Search 2020-07-28, 16:58
Replies: 386
Views: 33,801
Posted By axn
175k-176k

2^175039+1 = 15484028432318997071449
2^175129+1 = 2888518630291839590281
2^175261+1 = 2848252779458437457
2^175493+1 = 325457568819025683667387
2^175493+1 = 75725050851772673224508113465282811...
Forum: Hardware 2020-07-28, 07:43
Replies: 13
Views: 432
Posted By axn
Ryzen 5 3600[XT] is 6-core 32MB part

Ryzen 5 3600[XT] is 6-core 32MB part
Forum: Forum Feedback 2020-07-25, 16:43
Replies: 4
Views: 261
Posted By axn
Ubuntu 20.04 >> Settings >> Appearance >> Window...

Ubuntu 20.04 >> Settings >> Appearance >> Window Colors >> Dark
Same thing.

But each website will still do its own thing.
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