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Search: Posts Made By: retina
Forum: Lounge 2020-11-19, 13:30
Replies: 4,119
Views: 263,315
Posted By retina
You will have trouble to get cash, but you can...

You will have trouble to get cash, but you can write cheques. And then your cheques bounce (and you get fined).

It is abused for fraud (of course).

If you have a place to rent:
You: I'm...
Forum: Lounge 2020-11-18, 22:47
Replies: 4,119
Views: 263,315
Posted By retina
Sure, but the US is "special" when dealing with...

Sure, but the US is "special" when dealing with banking.

The funds show up in the account very quickly, BUT they still haven't been cleared. So now you think you have the funds, but actually you...
Forum: FermatSearch 2020-11-18, 22:42
Replies: 57
Views: 2,564
Posted By retina
I think your sarcasm detector is malfunctioning. ...

I think your sarcasm detector is malfunctioning.

Or maybe mine is?

Both of us?
Forum: FermatSearch 2020-11-17, 14:11
Replies: 57
Views: 2,564
Posted By retina
The main difference between F33 and pi is that we...

The main difference between F33 and pi is that we are only computing the value of pi. We can also compute the value of F33 easily.

The hard part is to test F33 for primeness. We will never test pi...
Forum: FermatSearch 2020-11-17, 14:01
Replies: 57
Views: 2,564
Posted By retina
Hehe. Yeah, 1085 and 285 is only 8...

Hehe.

Yeah, 1085 and 285 is only 8 different. So close it is. You are right. :razz:

Touché.
Forum: Miscellaneous Math 2020-11-16, 03:04
Replies: 48
Views: 1,027
Posted By retina
Here is something for free to help you "make it...

Here is something for free to help you "make it faster".

There is a three operand form of pow in Python. It is much faster than ** for large p with a small modulus.

Now have at it, and beat...
Forum: Miscellaneous Math 2020-11-15, 14:45
Replies: 48
Views: 1,027
Posted By retina
I think you misunderstand the genius of the code....

I think you misunderstand the genius of the code.

It says right near the beginning "Enter a Prime Number: ". So you see, you are not permitted to enter composite numbers.
Forum: Miscellaneous Math 2020-11-15, 06:07
Replies: 48
Views: 1,027
Posted By retina
Do you know about Fermat's little theorem...

Do you know about Fermat's little theorem (https://en.wikipedia.org/wiki/Fermat%27s_little_theorem)?

That is what you have done.
Forum: Soap Box 2020-11-14, 14:26
Replies: 527
Views: 27,079
Posted By retina
From his behaviour I get the impression that if...

From his behaviour I get the impression that if Trump could, he would change the law(s) to simply declare himself the winner of all elections regardless of the vote, and allow himself to stay in...
Forum: Miscellaneous Math 2020-11-13, 14:33
Replies: 16
Views: 510
Posted By retina
Yes, they are speed-up computations. So...

Yes, they are speed-up computations.

So whenever someone says it isn't fast enough, then you just remove one of them and now it is faster. It's pure genius!
Forum: Math 2020-11-13, 02:58
Replies: 3
Views: 165
Posted By retina
I'm not sure what your actual question is. ...

I'm not sure what your actual question is.

Are just trying to find perfect numbers?

If so, then all Mersenne primes can be used to construct an even perfect number. This is easy.

A more...
Forum: Lounge 2020-11-12, 13:46
Replies: 1,639
Views: 88,722
Posted By retina
Swim. It will be faster. And you will feel better...

Swim. It will be faster. And you will feel better for it.

:shark:
Forum: FermatSearch 2020-11-12, 03:27
Replies: 57
Views: 2,564
Posted By retina
MM127 :razz: Now please, someone, prove me...

MM127 :razz:

Now please, someone, prove me wrong and find a factor of that retched thing.
Forum: Math 2020-11-11, 10:32
Replies: 14
Views: 240
Posted By retina
Looks fine to me. Better than the run-on line of...

Looks fine to me. Better than the run-on line of text.

This is what I see (with backslash replaced by forward slash to prevent your fancy JS from seeing it):
/((H^{-1})_{ij} = (-1)^{i+j}(i + j -...
Forum: Math 2020-11-11, 09:06
Replies: 14
Views: 240
Posted By retina
Yes, I know. Mathjax is JS, so therefore not...

Yes, I know.

Mathjax is JS, so therefore not happening here.
Forum: Math 2020-11-11, 07:15
Replies: 14
Views: 240
Posted By retina
Thanks

:tu:
Forum: Math 2020-11-11, 06:32
Replies: 14
Views: 240
Posted By retina
That isn't tex, that is relying on some ugly JS...

That isn't tex, that is relying on some ugly JS interpreter.

This is tex:
\((H^{-1})_{ij} = (-1)^{i+j}(i + j - 1) \binom {n + i - 1}{n - j} \binom {n + j - 1}{n - i} \binom {i + j - 2}{i - 1}^2\)...
Forum: Math 2020-11-10, 13:58
Replies: 6
Views: 156
Posted By retina
Mathematically, yes, of course, you can do...

Mathematically, yes, of course, you can do whatever you want. But it would be weak and silly.

Practically, no. Keys should not be derived from some sort of master code, better that they are each...
Forum: kriesel 2020-11-10, 13:53
Replies: 28
Views: 1,890
Posted By retina
Hehe, well then Wiktionary disagrees with you...

Hehe, well then Wiktionary disagrees with you also. :razz:And Wikipedia says this:So I guess you actually meant multiposting.
Forum: FermatSearch 2020-11-10, 06:42
Replies: 57
Views: 2,564
Posted By retina
You can test F33 if you want to. But you need to...

You can test F33 if you want to. But you need to have all surpassing patience.

The difference is the iteration count. Did you see how many iterations for PI? Compare that to F33. Now do you see...
Forum: Miscellaneous Math 2020-11-09, 08:08
Replies: 16
Views: 510
Posted By retina
It might be fast, but it is wrong. There is...

It might be fast, but it is wrong.

There is no sense in driving at lightning speed when you are driving in the wrong direction.
Forum: Linux 2020-11-08, 06:46
Replies: 10
Views: 519
Posted By retina
I use 0kB swap files. I find I never need to...

I use 0kB swap files. I find I never need to swap. I think it is a "solution" looking for a problem when the system has plenty of RAM.
Forum: Lounge 2020-11-07, 10:18
Replies: 18
Views: 615
Posted By retina
I have never seen or heard of Fakebook. I'm not...

I have never seen or heard of Fakebook. I'm not sure if a typo or just poking fun at Facebook.

Assuming the latter. I have banned Facebook in my DNS. The minions were wasting far too much time...
Forum: Lounge 2020-11-07, 02:51
Replies: 4,119
Views: 263,315
Posted By retina
Haha. Yes, I live in mane collie formula, and I...

Haha. Yes, I live in mane collie formula, and I drive a toy motor.
Forum: Lounge 2020-11-06, 22:47
Replies: 18
Views: 615
Posted By retina
Yup. It's better than being lost in the sea of...

Yup. It's better than being lost in the sea of :poop: that Facebook is.

Narrow focus. Part of the small web (https://neustadt.fr/essays/the-small-web/).
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