mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 44
Search took 0.01 seconds.
Search: Posts Made By: plandon
Forum: Homework Help 2009-09-10, 22:00
Replies: 60
Views: 7,880
Posted By plandon
Smile "The question is at best poorly posed." "The...

"The question is at best poorly posed."
"The question itself is wrong headed".
"Part of learning mathematics is learning to ask the
right questions.

Part of learning mathematics is learning...
Forum: Lounge 2009-09-10, 21:20
Replies: 7
Views: 583
Posted By plandon
Data Transfer record?

http://www.theregister.co.uk/2009/09/10/pigeon_v_broadband/
South African homing pigeon transmits 4GByte in 2 hours; 1 hour 8 minutes for the 60 mile travel and 1 hour to download the ramstick,...
Forum: Math 2009-08-04, 11:09
Replies: 10
Views: 1,087
Posted By plandon
That is a large widening of the discussion. I...

That is a large widening of the discussion.
I note that I (and many others) have made more money from music and software than I have spent on music and software.
You are welcome to start a thread ...
Forum: Math 2009-08-03, 08:31
Replies: 10
Views: 1,087
Posted By plandon
An open access library is a good idea, and the...

An open access library is a good idea, and the maths community would benefit.

However the profit making publishers will not give away a right to copy.

The benefits of an electronic open access...
Forum: Math 2009-07-29, 18:59
Replies: 22
Views: 1,154
Posted By plandon
I've given it a moment more thought, and as a...

I've given it a moment more thought,
and as a certificate that I have read the links; there is a misprint in the last table of the poster A(105) should be 2. In the main paper tables 6 and 7, the...
Forum: Astronomy 2009-07-24, 19:45
Replies: 24
Views: 2,574
Posted By plandon
Just my counter-intuitive disputable tuppence...

Just my counter-intuitive disputable tuppence worth...

Assume it is just 2 bodies with point masses,
(point masses may be found in all school physics labs, next to the perfectly rigid massless...
Forum: Math 2009-07-20, 17:20
Replies: 22
Views: 1,154
Posted By plandon
Let me know when we can start throwing chalk...

Let me know when we can start throwing chalk :smile:

Serwus again Alex!
I will start to look at things the roots of unity direction, if I must, although I want to play with integers, preferably...
Forum: Math 2009-07-20, 13:42
Replies: 22
Views: 1,154
Posted By plandon
Haha, I can take it. In fact I rather enjoy a bit...

Haha, I can take it. In fact I rather enjoy a bit of cut & thrust.
And RD is right, my question was rather wobbly, and it is me that is asking for a gift of knowledge.
I will try to phrase it...
Forum: Math 2009-07-20, 08:49
Replies: 22
Views: 1,154
Posted By plandon
Thanks for that RD, sorry for waffling on,...

Thanks for that RD,

sorry for waffling on, but I am trying to understand it rather than just getting somebody to give me the answer.

I was thinking along the lines of degree of phi_n(x) =...
Forum: Math 2009-07-19, 21:20
Replies: 22
Views: 1,154
Posted By plandon
Thanks for that. Does anybody know of any...

Thanks for that.

Does anybody know of any results as n->infinity?

What is the average Phin(2)?
Is there a lower bound?
Forum: Forum Feedback 2009-07-19, 09:14
Replies: 9
Views: 1,768
Posted By plandon
or metreh10 ;)

or metreh10 ;)
Forum: Math 2009-07-16, 10:02
Replies: 22
Views: 1,154
Posted By plandon
Cyclotomic Phi

Does anybody know of any results on the average size of Phin(a), or a lower bound?
Has anybody even shown that Phin(a) !=1 ??

If anybody could point me in the direction of any books or papers I...
Forum: Data 2009-07-11, 19:26
Replies: 38
Views: 3,965
Posted By plandon
axn is of course right. Also 2*43112609 does...

axn is of course right.
Also 2*43112609 does divide 2*(243112608-1)

43112609 first divides 210778152-1 but I doubt it has the smallest k for that exponent.
Forum: Data 2009-07-11, 12:55
Replies: 38
Views: 3,965
Posted By plandon
Thanks for that. Will Edgington stores them as...

Thanks for that.
Will Edgington stores them as k's, so that makes it easier.

It looks like the fully factored ones do have the largest factor missing and some of the smaller exponents are...
Forum: Data 2009-07-09, 10:06
Replies: 38
Views: 3,965
Posted By plandon
Where may I find the data? There are no...

Where may I find the data?

There are no links at the bottom of that page and the link to factors.zip (ftp://mersenne.org/gimps/factors.zip) gives a 505 error.

How many factors should I expect...
Forum: Lounge 2009-07-07, 21:11
Replies: 11
Views: 887
Posted By plandon
More impressive at parties is if you then recite...

More impressive at parties is if you then recite the primes,
in binary ;)
Forum: Data 2009-07-07, 15:09
Replies: 38
Views: 3,965
Posted By plandon
The biggest known smallest k is...

The biggest known smallest k is (M42643801-1)/(2*42643801) :smile:

This thread is interesting.
What is the average k? How often is k=1?
or where is the data so that I can average it myself?
Forum: Math 2009-07-02, 00:26
Replies: 67
Views: 6,926
Posted By plandon
Is the royal we usual? Lemma 4 to 5: "Not...

Is the royal we usual?

Lemma 4 to 5:
"Not long afterwards" = 25 years+
Forum: Math 2009-06-30, 21:29
Replies: 7
Views: 999
Posted By plandon
Cool, respect. Of course -d'uh! So...

Cool, respect.


Of course -d'uh!

So after I have made every basic mistake possible I end up with
~2n1/2/log(n)
or BigTheta(n1/2/log(n))

On repeated factors of Phi, or generalised...
Forum: Math 2009-06-30, 12:35
Replies: 7
Views: 999
Posted By plandon
I meant 2,3+ or 3,2- ;/ All sloppiness and...

I meant 2,3+ or 3,2- ;/

All sloppiness and imprecision is mine and hopefully original and unique.
Whenever I type + I usually mean -
IANAM
Forum: Math 2009-06-30, 11:06
Replies: 7
Views: 999
Posted By plandon
Apologies for missing out a few big-Ohs or "~="...

Apologies for missing out a few big-Ohs or "~=" in my first post.


Xilman is right, they can contain repeated factors, but Wieferichs (and their generalisations) are not common in Phia(x) with...
Forum: Hardware 2009-06-30, 09:55
Replies: 39
Views: 3,038
Posted By plandon
But with the triple graphics card they throw in a...

But with the triple graphics card they throw in a free DeathMegaSplatter game :)

If I had won the lottery or my boss was off on indefinate mental health leave,
I woul pay to have the shark decal...
Forum: Math 2009-06-28, 00:41
Replies: 7
Views: 999
Posted By plandon
Prime Powers

Prime Powers (exponent >= 2) are supposed to be rare, but how rare?

No Cunningham numbers can be prime powers, so there is no problem there with SNFS or GNFS.

How rare are they?
Let C(n) be...
Forum: Hardware 2009-06-25, 16:40
Replies: 39
Views: 3,038
Posted By plandon
I meant 2.66GHz & 2.93 ps. I loved the...

I meant 2.66GHz & 2.93

ps. I loved the Helmer machines :)

Can you get 150W+ heat pipes?
Forum: Hardware 2009-06-25, 14:37
Replies: 39
Views: 3,038
Posted By plandon
I cannot get excited by 20 cheap PCs. I am...

I cannot get excited by 20 cheap PCs.
I am thinking more Lamborghini rather than a minibus.
Admittedly the minibus does more people.metres/second, but it is not a dream machine.
Other good threads...
Showing results 1 to 25 of 44

 
All times are UTC. The time now is 22:31.

Sun Jan 24 22:31:34 UTC 2021 up 52 days, 18:42, 0 users, load averages: 1.68, 1.89, 1.93

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.