long history

dbaugh · 2013-01-10, 23:00

There are some exponents that have a lot of history. 864917 has 346 History lines. I understand 1277 at 439 and 1619 at 270. Others do not make as much sense to me. I think they may result from submission error loops in some cases. Other than stumbling upon them, is there a way to find these long history exponents? I would love to collapse some with a factor. What are your best examples?

Batalov · 2013-01-11, 02:08

Somewhere in the world, there may be an Uni or maybe a school district where a former sys admin (who may be long gone) impregnated the OS image disk with a copy of self-starting Prime95 complete with a worktodo with this exponent. Now every time they reimage the computer (or computers... and even then, probably because the poor computers seem to run unexplicably slow!), the exponent is run all over again. (google "Brad Niesluchowski seti")

Just a wild theory.

petrw1 · 2013-01-11, 02:56

Quote:

Originally Posted by dbaugh

There are some exponents that have a lot of history. 864917 has 346 History lines. I understand 1277 at 439 and 1619 at 270. Others do not make as much sense to me. I think they may result from submission error loops in some cases. Other than stumbling upon them, is there a way to find these long history exponents? I would love to collapse some with a factor. What are your best examples?

Well there's 1,000,003 that was LL'd many times before it was subsequently P-1's about 100 times.

I believe there was another just a little higher in the low 1M range that was LL's a hundred or more times.

kracker · 2013-01-11, 02:58

Quote:

Originally Posted by Batalov

...

self-starting Prime95 complete with a worktodo with this exponent. Now every time they reimage the computer (or computers... and even then, probably because the poor computers seem to run unexplicably slow!), the exponent is run all over again. (google "Brad Niesluchowski seti")

Just a wild theory.

Computer-Atelophobia?

TObject · 2013-01-11, 23:37

Doing a quick double-check on a low exponent, is a fast way to verify the setup is working. I have done it a couple of times when setting up new computers before letting them loose.

lycorn · 2013-01-12, 20:50

You may as well test a known prime.
It also tests the system, with the plus of making you feel an important person when the result pops out

...

2013-01-10, 23:00	#1
dbaugh Aug 2005 2×59 Posts	long history There are some exponents that have a lot of history. 864917 has 346 History lines. I understand 1277 at 439 and 1619 at 270. Others do not make as much sense to me. I think they may result from submission error loops in some cases. Other than stumbling upon them, is there a way to find these long history exponents? I would love to collapse some with a factor. What are your best examples?

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2013-01-11, 02:08	#2
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 9,497 Posts	Somewhere in the world, there may be an Uni or maybe a school district where a former sys admin (who may be long gone) impregnated the OS image disk with a copy of self-starting Prime95 complete with a worktodo with this exponent. Now every time they reimage the computer (or computers... and even then, probably because the poor computers seem to run unexplicably slow!), the exponent is run all over again. (google "Brad Niesluchowski seti") Just a wild theory.

2013-01-11, 23:37	#5
TObject Feb 2012 3⁴·5 Posts	Doing a quick double-check on a low exponent, is a fast way to verify the setup is working. I have done it a couple of times when setting up new computers before letting them loose.

2013-01-12, 20:50	#6
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 2×11×67 Posts	You may as well test a known prime. It also tests the system, with the plus of making you feel an important person when the result pops out ...