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Search took 0.04 seconds. Search: Posts Made By: Graff
Forum: Lounge 2012-01-11, 17:49
Replies: 42
Views: 2,682
Posted By Graff
I contacted the maintainer of that page and the...

I contacted the maintainer of that page and the imprecise statement has been replaced.

Gareth
Forum: Lounge 2012-01-10, 23:28
Replies: 42
Views: 2,682
Posted By Graff
It doesn't disagree substantially. The...

It doesn't disagree substantially. The definition on the IAU page is
almost correct. My definition using k is exact. 2 * \pi / k = 365.2568983... days.
I'm an IAU member and my primary work is...
Forum: Lounge 2012-01-09, 22:50
Replies: 42
Views: 2,682
Posted By Graff
Urm, no. One AU is the heliocentric distance at...

Urm, no. One AU is the heliocentric distance at which a massless particle in a circular, unperturbed orbit would have a mean motion of k ( = 0.01720209895) radians/day.

The value of k is that...
Forum: Science & Technology 2011-11-13, 16:18
Replies: 2,921
Views: 247,747
Posted By Graff
Key point about this approach is that it was...

Key point about this approach is that it was predicted well in advance
(2005 YU55 was already a multi-opposition object before this latest
close approach) and the uncertainty region at time of...
Forum: GPU Computing 2011-09-30, 20:09
Replies: 3,498
Views: 416,853
Posted By Graff
Does that statement refer only to results...

Does that statement refer only to results reported via mfaktc? Whenever
I report factoring results in the 4M range, found factors always get
credited as F-ECM. A recent example is included below:...
Forum: Lone Mersenne Hunters 2011-09-03, 17:03
Replies: 37
Views: 23,194
Posted By Graff
Any chance of getting the...

Any chance of getting the currently-being-worked-on-ranges information
into the "List of LoneMersenneHunter ranges currently out" sticky? Having
the active regions listed in one place would be...
Forum: Science & Technology 2010-09-10, 01:02
Replies: 47
Views: 6,892
Posted By Graff
Very unlikely. With a diameter under 10 m, it is...

Very unlikely. With a diameter under 10 m, it is improbable that there
are any images of this object in the archives of photographic plates
and CCD images. (2010 RF12 reached only mag ~ 13 moving...
Forum: Science & Technology 2010-09-09, 21:40
Replies: 47
Views: 6,892
Posted By Graff
Yes, I did the initial impact-analysis for 2010...

Yes, I did the initial impact-analysis for 2010 RF12 that showed this object
couldn't come closer than about 10 Earth radii. And I did the initial
Minor Planet Electronic Circular announcing the...
Forum: Lone Mersenne Hunters 2010-07-31, 04:45
Replies: 109
Views: 43,122
Posted By Graff
You would appear to be correct in this thought. ...

You would appear to be correct in this thought. I'm currently factoring
in the 1.5-1.6M range, extending the upper limit from 2^61 (or
occasionally 2^62) to 2^63, and checking the entire range up...
Forum: Science & Technology 2010-06-28, 20:41
Replies: 47
Views: 6,892
Posted By Graff
The key point here is that the non-gravitational...

The key point here is that the non-gravitational forces are not constant.
If they were, comets would be as predictable as minor planets.



Depends on the field-of-view of the instrument that...
Forum: Lone Mersenne Hunters 2010-05-16, 23:48
Replies: 109
Views: 43,122
Posted By Graff
Hmm. They've disappeared again. They were there...

Hmm. They've disappeared again. They were there when I checked
this morning (I think that was the last time I checked). I'm reporting
some more results via the manual reporting forms.

Graff
Forum: Lone Mersenne Hunters 2010-05-15, 01:17
Replies: 109
Views: 43,122
Posted By Graff
Well, my attempt to get all the grabbed 1.5M...

Well, my attempt to get all the grabbed 1.5M exponents registered to my
LMH work appeared to work. I registered ~1400 exponents on May 12
using a custom DCL command file that made calls to the...
Forum: PrimeNet 2010-01-25, 16:14
Replies: 2
Views: 560
Posted By Graff
I should have checked the exponent status of...

I should have checked the exponent status of M49252573.
Apparently, P-1 found a factor. So this is not a new problem.

Graff
Forum: PrimeNet 2010-01-25, 15:38
Replies: 2
Views: 560
Posted By Graff
Another server(?) oddity

I was assigned M49252573 for first-time LL checking. Before starting
the LL, it was running P-1. I had to reboot the system. When the
system restarted, Prime95 aborted processing M49252573 and...
Forum: Software 2009-12-24, 03:47
Replies: 9
Views: 1,609
Posted By Graff
Several more factors > 2^64 found by P-1 and...

Several more factors > 2^64 found by P-1 and every time mprime crashes.
Forum: PrimeNet 2009-12-24, 03:18
Replies: 44
Views: 4,914
Posted By Graff
A related request: a daily text-file dump of all...

A related request: a daily text-file dump of all the results and cleared exponents
reported in the past 24 hours and an archive of the last week or month of such
dumps. It is quite often the case...
Forum: Software 2009-12-06, 05:41
Replies: 9
Views: 1,609
Posted By Graff
Another segfault, another factor found by P-1. ...

Another segfault, another factor found by P-1.

Gareth
Forum: Software 2009-12-02, 05:19
Replies: 9
Views: 1,609
Posted By Graff
Segfault in mprime v25.11 build 2

This has now happened a couple of times: an mprime job running under
64-bit Linux has segfaulted. The problem seems to always occur immediately
after a factor is found via P-1 factoring.
...
Forum: Lone Mersenne Hunters 2009-11-20, 01:25
Replies: 17
Views: 5,761
Posted By Graff
Wasn't able to respond to this earlier as I was...

Wasn't able to respond to this earlier as I was at work and I can't
remember my forum password!

As noted in a thread in the LMH section, I use a port of Peter
Montgomery's MFactor on a number of...
Forum: Linux 2009-11-06, 18:56
Replies: 11
Views: 3,347
Posted By Graff
My problems so far: 1) Log files growing...

My problems so far:

1) Log files growing rapidly to GBs in size and filling partition.

2) Intel Fortran compiler not compiling. Needs file /usr/lib/libstdc++.so.5
(not sure why it isn't...
Forum: PrimeNet 2009-11-04, 04:14
Replies: 1,444
Views: 105,977
Posted By Graff
The factor is not prime: ...

The factor is not prime:
4655372538754486733614467124913690121322890046151 = 29359077499843468232567 × 158566717185828044566850353

Apparently, this factorization was also found by the server as...
Forum: PrimeNet 2009-05-30, 03:15
Replies: 44
Views: 4,914
Posted By Graff
Fully factored exponents?

Is there any way to show in the V5 server whether a specific exponent
is fully factored?

The Known Factors report indicates "If a Mersenne number has been fully
factored the largest factor is...
Forum: Lone Mersenne Hunters 2009-05-21, 20:34
Replies: 7
Views: 3,431
Posted By Graff
Never mind. I see that results in the 97-98M...

Never mind. I see that results in the 97-98M range have started
appearing in the last hour or so.
Forum: Lone Mersenne Hunters 2009-05-21, 18:42
Replies: 7
Views: 3,431
Posted By Graff
Are you (Bundu) still working this range? I see...

Are you (Bundu) still working this range? I see no new factors reported
in the 97-98M range since April 8. I'm asking because I'm looking
for a new LMH range to work on.
Forum: PrimeNet 2009-03-17, 13:52
Replies: 377
Views: 34,274
Posted By Graff
This is not Prime 95 or mprime, so automatic...

This is not Prime 95 or mprime, so automatic server assignment is not
an option. In any case, I don't think that it would be any more secure
against poaching than using the manual assignment form....
Showing results 26 to 50 of 236
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