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Old 2014-03-26, 16:08   #34
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Code:
M( M( 756839 ) )U: k=300000             # Luigi Morelli, Own sieving program and pfgw.
M( M( 859433 ) )U: k=300000             # Luigi Morelli, Own sieving program and pfgw.
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Old 2016-01-21, 18:32   #35
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The history page has been updated with new limits for k.

Also, a new slot has been added for M49: its ks are actually under sieve (it will stop at 100T)

It seems that I am the one working on this project, and looking for a big non-Mersenne prime...

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Old 2016-01-22, 20:08   #36
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I will help with the sieve. tell me wich one to run.

Last fiddled with by firejuggler on 2016-01-22 at 20:19
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Old 2016-01-22, 21:05   #37
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most of the k found on the double mersenne page for MM49 trivially factor. Or did I made a mistake?
Attached Files
File Type: txt pfgw MM49.txt (1.6 KB, 243 views)
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Old 2016-01-22, 21:20   #38
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Quote:
Originally Posted by firejuggler View Post
most of the k found on the double mersenne page for MM49 trivially factor. Or did I made a mistake?
A small mistake... Mersenne factors are of the form 2kp + 1, not 2kp - 1 :smiile:

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Old 2016-01-22, 21:22   #39
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I am actually sieving at 3.2T, having 39,146 k left from 3 to 2,000,000.

Luigi

Last fiddled with by ET_ on 2016-01-22 at 21:23
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Old 2016-01-22, 21:27   #40
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gaaa can't believe I made that mistake. Carry on... and remind me how to sieve those giant again...
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Old 2016-01-22, 21:44   #41
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Quote:
Originally Posted by firejuggler View Post
gaaa can't believe I made that mistake. Carry on... and remind me how to sieve those giant again...
I wrote a siever which can progress 2.4T/day on my old core i5-750 (@2.66GHz). It will be a long way to 150T I want to reach, but if you want to help, I can share part of the range with you. :-) Note that the siever is written for GCC and require Linux or MinGW64...

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Old 2016-01-22, 22:01   #42
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Quote:
Originally Posted by ET_ View Post
A small mistake... Mersenne factors are of the form 2kp + 1, not 2kp - 1 :smiile:

Luigi
true but I don't see it as complete waste ( not that I'm important I mainly just look over half the subforums over the course of a day) because $(2kp-1)^{2a}$ will be eliminate some composites if they still exist in the 2kp+1 values as it expands to $(4*p^2*k^2 - 4*p*k + 1)^a = (2(pk^2+2k)p+1)^a$

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Old 2016-01-22, 22:14   #43
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I used batalov script on the first page so far, not conclusive... i'll take the minGW64 script

edit : finally understood how the scipt work. well it work.

Last fiddled with by firejuggler on 2016-01-22 at 23:05
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Old 2016-01-23, 00:27   #44
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ok, started working @ 150 T, now @ around 160T. will go up to 200 then work a bit backward. (if thats okay with you)
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