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Old 2022-05-28, 14:40   #2146
James Heinrich
 
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Quote:
Originally Posted by charybdis View Post
I see that Paul's list still hasn't ben updated. Did the code work correctly?
It did, the email was sent, perhaps he's on vacation or something?
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Old 2022-05-31, 02:06   #2147
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Quote:
Originally Posted by James Heinrich View Post
It did, the email was sent, perhaps he's on vacation or something?
Well there's a factor from 27 May on his top-10 ECM page for this year. Maybe he needs a nudge.
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Old 2022-05-31, 02:08   #2148
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Quote:
Originally Posted by charybdis View Post
Well there's a factor from 27 May on his top-10 ECM page for this year. Maybe he needs a nudge.
I talked to him earlier today, I imagine he will get the page updated sometime over the next few days.
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Old 2022-05-31, 17:13   #2149
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Quote:
Originally Posted by James Heinrich View Post
I talked to him earlier today, I imagine he will get the page updated sometime over the next few days.
He replied:
Quote:
Originally Posted by Paul Zimmerman
for some reason I missed that report. It is now #10 on the list.
https://members.loria.fr/PZimmermann...s/Pminus1.html
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Old 2022-06-05, 02:16   #2150
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P-1 found a factor in stage #1, B1=494000.
UID: Jwb52z/Clay, M115693873 has a factor: 1952359233750913828524289 (P-1, B1=494000)

80.691 bits.
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Old 2022-06-08, 15:42   #2151
Denial140
 
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I've been running large P-1 on 4.96M to 4.97M without much luck (3 factors in 84 attempts, P-1 calculator predicts 12% increase in factor probability), with a success this morning! M4963463 has factor 740152403849563084825547533175743, 109.190 bits.

I've wondered whether these dry streaks are just bad luck, or if there is something wrong with my machine. I ran some P-1 tests that had previously found factors and all factors were found again, so I would expect not (maybe something tends to go wrong in the longer runs but not in the shorter ones?) Does anyone have any suggestions/ideas for how better to test?
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Old 2022-06-08, 18:47   #2152
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Quote:
Originally Posted by Denial140 View Post
I've wondered whether these dry streaks are just bad luck, or if there is something wrong with my machine.

Does anyone have any suggestions/ideas for how better to test?
The first question is valid, and the answer is - yes, both are possible.

Consider this analogy:
"I buy lottery tickets, fill in six numbers, and then scan them, and then wait to win. Sometimes I win twice in a row, and sometimes I have weeks and weeks without a win.
I've wondered whether these dry streaks are just bad luck, or if there is something wrong with my filling the tickets. Maybe my pen is broken, maybe I not filling the bubbles completely so that the lottery scanner cannot read them?"
Sure - both are possible.
Re: luck - Same as the poisson process of drawing a card from a deck and expect an ace. Sometimes you will draw two aces in a row, maybe even three, and sometimes you can draw 50 times and not get an ace.

For the second question - follow the analogy. Is there a better way to win in a lottery? Just like with the lottery, there are trivial solutions, for example with unlimited money buy _all_ the tickets, you will be guaranteed to win. Impractical though.
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Old 2022-06-08, 19:20   #2153
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Quote:
Originally Posted by Batalov View Post
For the second question - follow the analogy. Is there a better way to win in a lottery? Just like with the lottery, there are trivial solutions, for example with unlimited money buy _all_ the tickets, you will be guaranteed to win. Impractical though.
Sorry, I was not clear - I mean specifically testing for machine errors without taking too long.
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Old 2022-06-08, 20:47   #2154
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Ah. Run the stability test (a.k.a. torture) - it is built in the program. Many folks run it once they have just built a new machine, for 24 - 48+ hours (best to run for several ambient temperature cycles - day/night. continuously). The key is - the code knows the true answer so it can compare. *

It is hard to test otherwise (when answer is unknown).

____
* that actually reminded me to run that too, - summer is here. It is good to run the torture test at least once a year, too.
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Old 2022-06-14, 09:15   #2155
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Quote:
Originally Posted by Batalov View Post
For the second question - follow the analogy. Is there a better way to win in a lottery? Just like with the lottery, there are trivial solutions, for example with unlimited money buy _all_ the tickets, you will be guaranteed to win. Impractical though.
The best way to win the lottery is not to buy any tickets. That way you don't lose, and since the opposite of a loss is a win ...
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Old 2022-06-20, 04:27   #2156
linament
 
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Default Two composite factors in a single day

I didn't think I was ever going to get a P-1 factor that I thought was worthy of posting here; but, today (PDT), I found 8879293 has a composite factor, 1952505446389508559973390809501412786062062585404808923663962210457688947228452593 (270.042 bits):
509948624278384111727110637486537527543 (128.584 bits) and 3828827755251720703479206898096918957995351 (141.458 bits)
Also found today, but slightly less impressive, I found 8859827 has a composite factor, 35645538757884671884030612032344482636735761042071 (164.608 bits):
39185475778814976961751 (75.053 bits) and 909662012504027897396320321 (89.565 bits)
My first ever double composite in a single day.

Last fiddled with by Uncwilly on 2022-06-20 at 19:52 Reason: Fixed typos
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