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Old 2020-08-05, 10:53   #1
alfamath1004
 
Aug 2020

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Default 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
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Old 2020-08-05, 12:20   #2
kriesel
 
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Quote:
Originally Posted by alfamath1004 View Post
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
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Old 2020-08-05, 13:52   #3
Uncwilly
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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.
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Old 2020-08-05, 14:00   #4
retina
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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.
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Old 2020-08-05, 14:04   #5
Uncwilly
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Quote:
Originally Posted by retina View Post
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."
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Old 2020-08-05, 14:28   #6
retina
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Quote:
Originally Posted by retina View Post
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.
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Old 2020-08-05, 15:07   #7
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Quote:
Originally Posted by Uncwilly View Post
"The House [GIMPS Inc] always wins."
The EFF Computing Awards are a conspiracy made up by electric companies to sell more kilowatt hours.
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Old 2020-08-05, 15:10   #8
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Quote:
Originally Posted by Runtime Error View Post
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.
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Old 2020-08-05, 18:13   #9
ATH
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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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