The Original 'Ode To Joy' thread

[markr]

Okay... going off-topic, but this raises a mystery. My v4 and v5 results give a total of 1054 LL results:

                v4    v5
verified       683   260
unverified      15    82
bad              4     2
factored         8
total          710   344

But the User Summary page shows 748 LL and 252 LL-D. Thoughts?

[Christenson]

No thoughts on statistical discrepancies tonight......

But my large transistor drive just pulsed the brake chopper at 2250A or so, and when it turned off in 2/3 of a microsecond, the voltage overshoot was only 250V!!!! (we also got less current on the second 500us shot, as the hunk of nichrome used for a resistor was getting warm)

(This system is designed like a circuit card, but the traces are 3/8" silver-flashed copper plate)

Now we just have to find out if the CFD model of heat removal through the heatpipes is valid....the fans sound like jet engines....

[ckdo]

Minor bug there

Factors found: 1
Processing result: M42076147 has a factor: 253800742877876058321873127553656103424529
Composite factor 253800742877876058321873127553656103424529 = 440237442706656029089 * 576508761538921230961
CPU credit is 1293893770886532300800.0000 GHz-days.

[petrw1]

Originally Posted by ckdo

This has you at 1,017 including 91 from the v4 era.

I stand corrected .... I didn't realize my summary was counting but V4 and V5

[NBtarheel_33]

Originally Posted by ckdo

Minor bug there

Factors found: 1
Processing result: M42076147 has a factor: 253800742877876058321873127553656103424529
Composite factor 253800742877876058321873127553656103424529 = 440237442706656029089 * 576508761538921230961
CPU credit is 1293893770886532300800.0000 GHz-days.

You're helping GIMPS reach a milestone. George must be enhancing the credit for the preferred exponents...

Incidentally, do you now have that much GIMPS credit lifetime?! You're like the Bill Gates of GIMPS!

[petrw1]

Originally Posted by ckdo

Minor bug there

Factors found: 1
Processing result: M42076147 has a factor: 253800742877876058321873127553656103424529
Composite factor 253800742877876058321873127553656103424529 = 440237442706656029089 * 576508761538921230961
CPU credit is 1293893770886532300800.0000 GHz-days.

And lookie here:

PrimeNet Top Trial Factoring Producers
Customize... 
Top trial factoring producers for the last year.This hourly report generated Jul 14 2011  9:00PM UTC
 
                                  Total                     |      Rank Change
 Rank  Member Name              GHz-Days Attempts Successes |90day 30day 7 day 1 day
------ -------------------- ------------ -------- --------- |----- ----- ----- -----
     1 Carsten Kossendey    ************   112315      1546 |   7    9   10   10 
     2 TheJudger              139237.568    13694       129 |   1    1    1    1 
     3 nucleon                 89072.620    82752      1336 |   4    1    1    1 
     4 ANONYMOUS               73125.987   186968      2891 |   2    1    1    1 
     5 shauge                  68024.598    24597       105 |  40          1    1 
     6 Ungelovende             63423.889    73198       907 |   3    2    1    1 
     7 steinrar                53720.103    42973       574 |   1    1    1    1 
     8 amphoria                48076.310      827         5 |   4    1    1    1 
     9 Xyzzy                   47137.780    35884       293 | 113    2    1    1 
    10 GIMPS Visualization     46514.275  5165382     79796 |   7    4    2    1

[ckdo]

Originally Posted by petrw1

And lookie here:

[snip!]

"Starred member". This will break some scripts.

[Xyzzy]

We have never ridden a motorcycle before, but we figured that should not be a deterrent from trying, so we snagged a cute red one today. We spent the afternoon riding in a large parking lot across the street. So far we can shift to second gear and take off from a stop without stalling it. Anything over 3,000RPM is too scary for now, but riding like an old grandma is still a lot of fun!

Unbelievable but true: There is no mandatory helmet law in Arkansas!

[Christenson]

These days, in VA, I think we have mandatory motorcycle training classes....two days in a large, empty parking lot at a local high school on state-owned bikes doing various exercises....

[xilman]

Originally Posted by Xyzzy

We have never ridden a motorcycle before, but we figured that should not be a deterrent from trying, so we snagged a cute red one today. We spent the afternoon riding in a large parking lot across the street. So far we can shift to second gear and take off from a stop without stalling it. Anything over 3,000RPM is too scary for now, but riding like an old grandma is still a lot of fun!

Unbelievable but true: There is no mandatory helmet law in Arkansas!

Wow, that's a mean machine for a newbie! No disrespect, but please be damned careful on that thing. It's not what I would have recommended as a first bike.

There's a technical term for a motorcyclist who doesn't wear a helmet. It's "corpse". I strongly recommend also wearing leather gauntlets and proper leather motorbike boots whenever you ride a bike, and never ride bare-armed and/or bare-legged no matter how hot the weather. It's amazing how much skin you lose, and how easily it wears off, when (not if) you go sliding down the road.

I speak from experience. I've been riding bikes since 1974, currently ride a 1100cc Honda Pan-European and have never had a worse injury than a cracked bone in my wrist (falling off at 5mph!) or a few inconsequential grazes.

Assuming you survive the first couple of years (I'm serious), you should get a lot of fun out of biking.

Oh yes, one other thing to remember: paranoia is a survival characteristic for bikers. You can be pretty near certain that motorists are out to get you. The first couple of years I mentioned is roughly how long it takes to learn how to be somewhere else when the accidents happen.

Good luck!

Paul

[davieddy]

I thoroughly endorse the above advice!

My sheepskin-lined leather boots were about the most
comfortable footwear I have owned.

I could list many disappointments you may experience
once the initial thrill wears off:

MPG, forced convection and "pneumatic drill syndrome" to name but 3.

David