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Search: Posts Made By: marc
Forum: Math 2006-02-07, 00:20
Replies: 10
Views: 1,841
Posted By marc
For a power of a prime f(p**n) = n+1 and f is...

For a power of a prime f(p**n) = n+1 and f is multiplicative. Easy peasy.
Forum: Hobbies 2006-01-23, 21:49
Replies: 31
Views: 1,654
Posted By marc
http://en.wikipedia.org/wiki/Martingale_%28roulett...

http://en.wikipedia.org/wiki/Martingale_%28roulette_system%29

Also according to http://en.wikipedia.org/wiki/Blackjack#Basic_strategy the best you can hope for is a house advantage of 0.16% but...
Forum: Lone Mersenne Hunters 2006-01-17, 22:50
Replies: 4
Views: 520
Posted By marc
Really done now. No more factors.

Really done now. No more factors.
Forum: Lone Mersenne Hunters 2006-01-17, 17:47
Replies: 4
Views: 520
Posted By marc
Strange... [Wed Dec 14 10:03:35 2005] UID:...

Strange...

[Wed Dec 14 10:03:35 2005]
UID: mldl/hex, M62852191 no factor to 2^62, Wc2: 5B57A247
UID: mldl/hex, M62852243 no factor to 2^62, Wc2: 5B52A244
[Wed Dec 14 10:12:28 2005]
UID:...
Forum: Lone Mersenne Hunters 2006-01-06, 15:32
Replies: 4
Views: 520
Posted By marc
Done. 200 factors found.

Done. 200 factors found.
Forum: Lone Mersenne Hunters 2005-11-21, 21:41
Replies: 1
Views: 398
Posted By marc
Done. 143 factors

Done. 143 factors
Forum: Lone Mersenne Hunters 2005-11-14, 02:04
Replies: 4
Views: 520
Posted By marc
62.5 - 63 to 2^62

12225 exponents
Forum: Programming 2005-10-30, 00:27
Replies: 7
Views: 5,386
Posted By marc
It doesn't exactly relate to the programming but...

It doesn't exactly relate to the programming but there's a closed expression for this.

If a is your initial investment then a * r^n is equal to the value of your investment after t years. so ar^n...
Forum: Programming 2005-10-29, 04:12
Replies: 7
Views: 5,386
Posted By marc
I love python. What do you need help with?

I love python. What do you need help with?
Forum: Lone Mersenne Hunters 2005-10-12, 18:08
Replies: 4
Views: 484
Posted By marc
Done... 216 factors

Done...

216 factors
Forum: Lone Mersenne Hunters 2005-10-12, 14:58
Replies: 1
Views: 398
Posted By marc
63.5-63.9 to 2^62

9968 exponents
Forum: Programming 2005-09-23, 04:52
Replies: 18
Views: 2,175
Posted By marc
It's not a proof but instead of checking if any...

It's not a proof but instead of checking if any number has the right property, look for numbers which multiply to give numbers with the property.

Some python code...


def fujiwara(n):
for...
Forum: Software 2005-09-19, 04:25
Replies: 8
Views: 949
Posted By marc
Well it goes up and down with the weather/the...

Well it goes up and down with the weather/the time since the last prime/time of year/whatever else. A gain of 4 teraflops says that the general trend is up. Seems a good thing to me.
Forum: Software 2005-09-18, 16:38
Replies: 8
Views: 949
Posted By marc
I guess that page isn't really updated. You...

I guess that page isn't really updated.

You can check http://mersenne.org/primenet/summary.txt which is updated every hour and suggests that we've gained 4 teraflops.

Go us!
Forum: Programming 2005-09-04, 22:28
Replies: 3
Views: 498
Posted By marc
http://swiss.csail.mit.edu/classes/6.001/abelson-s...

http://swiss.csail.mit.edu/classes/6.001/abelson-sussman-lectures/

You can even attend the lectures as you go along...
Forum: mersennewiki 2005-09-04, 14:02
Replies: 87
Sticky: Mersennewiki?
Views: 11,799
Posted By marc
Just ask Xyzzy to install mediawiki on the server...

Just ask Xyzzy to install mediawiki on the server that runs this forum. The whole point of a wiki is no one person has to compile anything. We all just write the best things we can come up with and...
Forum: Lone Mersenne Hunters 2005-09-01, 01:03
Replies: 4
Views: 484
Posted By marc
Bah. I don't know what I did. I'm doing 66.5...

Bah. I don't know what I did.

I'm doing 66.5 to 67. I have no idea how I could mess so many of the digits around. Should I start a new topic or not?
Forum: Lone Mersenne Hunters 2005-08-31, 20:20
Replies: 4
Views: 484
Posted By marc
66.5-67M to 2^62

12381 exponents
Forum: Lone Mersenne Hunters 2005-08-29, 18:06
Replies: 1
Views: 405
Posted By marc
Done. 36 factors.

Done. 36 factors.
Forum: Homework Help 2005-08-21, 20:14
Replies: 36
Views: 94,493
Posted By marc
The c sounds like "member of". See...

The c sounds like "member of".

See http://en.wikipedia.org/wiki/Member

The second sounds like sigma which would mean "sum of".

See http://en.wikipedia.org/wiki/Sigma
Forum: Lone Mersenne Hunters 2005-08-17, 02:53
Replies: 1
Views: 307
Posted By marc
Done. 68 factors.

Done. 68 factors.
Forum: Lone Mersenne Hunters 2005-08-11, 18:40
Replies: 1
Views: 405
Posted By marc
39-39.1M to 2^62

Since there are no more 60 bit assignments left I'll take these.

2456 exponents.
Forum: Lone Mersenne Hunters 2005-07-18, 18:03
Replies: 60
Views: 3,790
Posted By marc
Just fwiw. With 17th July file I get: ...

Just fwiw.

With 17th July file I get:

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
33000000 0 4291 1258 0 ...
Forum: Math 2005-07-10, 17:03
Replies: 18
Views: 1,917
Posted By marc
y = a^x digits in base 10 is floor(log10(y))...

y = a^x

digits in base 10 is floor(log10(y)) + 1

log10(a^x) = x*log10(a) so floor(x*log10(a)) + 1
Forum: PrimeNet 2005-07-07, 11:28
Replies: 11
Views: 896
Posted By marc
Just run 2 copies of prime95/mprime. If you leave...

Just run 2 copies of prime95/mprime. If you leave them to run themselves then they'll automatically pick up the best work.
Showing results 1 to 25 of 139

 
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