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 2020-08-05, 10:53 #1 alfamath1004   Aug 2020 12 Posts What assignments to win money??? Hi, could anyone please tell me which of the following assignments give the possibility to win the $3,000 prize? or the$50,000 prize? LL - LL first test LL-WR- LL test for world record LL-100M- LL test 100+ milion digits D - LL double-check PRP - PRP first test PRP-WR- PRP test for world record PRP-100M- PRP test 100+ milion digits PRP-D - PRP double-check TF - trial factoring TF-LMH - trial factoring LMH PM1-L - factor P-1 large PRP-CF - PRP cofactor test PRP-CF-D - PRP cofactor double-check ECM - factor ECM small ECM-CF - ECM cofactor ECM-F - factor ECM Fermat I know the question has been already asked many times, but I didn't find a precise answer. Thank you
2020-08-05, 12:20   #2
kriesel

"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest

4,451 Posts

Quote:
 Originally Posted by alfamath1004 Hi, could anyone please tell me which of the following assignments give the possibility to win the $3,000 prize? or the$50,000 prize? LL - LL first test LL-WR- LL test for world record LL-100M- LL test 100+ million digits ... PRP - PRP first test PRP-WR- PRP test for world record PRP-100M- PRP test 100+ million digits ... I know the question has been already asked many times, but I didn't find a precise answer. Thank you
$3K possible but unlikely for PRP, PRP-WR, LL, LL-WR.$50K possible but very unlikely for PRP-100M. LL-100M also but not recommended because of the likelihood of an error i n the long computation. https://www.mersenne.org/legal/
The most likely outcome is losing money if accounting for the cost of electricity to run the computations and prorated cost of hardware to run it on. It's much worse economically (before taxes) than buying lottery tickets. I compute the cost of a 100Mdigit primality test as $35 for a well chosen gpu and software and electricity at$0.12/kwhr, and the chance of it finding a prime less than 1 in 6 million, so the probability weighted payback on that $35. spent is$0.0083, so a return of 0.036% . Lotteries typically return 60.-70.%, nearly 1800 TIMES better payback, and still a losing proposition. Do GIMPS runs for fun, not profit.

Last fiddled with by kriesel on 2020-08-05 at 12:21

 2020-08-05, 13:52 #3 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 8,627 Posts As the above post hinted at, we are transitioning to doing PRP as the primary test to to find primes (it used to be the LL test). So, all first time checks should be PRP tests. The PRP test has 2 main advantages. 1 is superior error checking during the test to catch errors during a test. This prevents a whole test from becoming wasted by an error. The second is a new technique that currently being worked on and will soon be deployed that will allow us to eliminate a full double check of every test. Instead once it is deployed, the PRP test will generate a file, that can be processed to verify the result and accuracy of the test in a small fraction of the time. Currently all first time tests being assigned are higher than the previous record, and would be eligible for the \$3K prize. So the "world record" assignments are currently the same as the "first test" assignments.
 2020-08-05, 14:00 #4 retina Undefined     "The unspeakable one" Jun 2006 My evil lair 22·5·7·41 Posts I think the salient point here to answer the question is that for the most part no assignments win money unless you are very very lucky to find the needle in the haystack.
2020-08-05, 14:04   #5
Uncwilly
6809 > 6502

"""""""""""""""""""
Aug 2003
101×103 Posts

8,627 Posts

Quote:
 Originally Posted by retina I think the salient point here to answer the question is that for the most part no assignments win money unless you are very very lucky to find the needle in the haystack.
"The House [GIMPS Inc] always wins."

2020-08-05, 14:28   #6
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

22×5×7×41 Posts

Quote:
 Originally Posted by retina I think the salient point here to answer the question is that for the most part no assignments win money unless you are very very lucky to find the needle in the haystack.
I should add that no one knows if there are any more needles to be found. There might not be any more.

2020-08-05, 15:07   #7
Runtime Error

Sep 2017
USA

100100002 Posts

Quote:
 Originally Posted by Uncwilly "The House [GIMPS Inc] always wins."
The EFF Computing Awards are a conspiracy made up by electric companies to sell more kilowatt hours.

2020-08-05, 15:10   #8
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

22×5×7×41 Posts

Quote:
 Originally Posted by Runtime Error The EFF Computing Awards are a conspiracy made up by electric companies to sell more kilowatt hours.
It seems to be working.

Make sure to buy more shares in energy companies when the next prime is found.

 2020-08-05, 18:13 #9 ATH Einyen     Dec 2003 Denmark 294010 Posts It's like the lottery commercial in The Simpsons, you have to listen to the quiet part or read the small print: "The state lottery where everybody wins. Actual odds of winning 1 in 380 million".

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