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Message boards : Sieving : Need help to find out what sieving ranges are

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Michael

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Message 16480 - Posted: 26 Jun 2009 | 21:47:21 UTC

could someone give me a key to decode

1010G
1010T and
1010M etc.

as in just tell me what those values are in terms of sieving ranges

John
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Message 16483 - Posted: 26 Jun 2009 | 22:55:49 UTC - in response to Message 16480.

could someone give me a key to decode

1010G
1010T and
1010M etc.

as in just tell me what those values are in terms of sieving ranges

1010G=1010000000000
1010T=1010000000000000
1010M=1010000000

You'll also see P. Using your example:

1010P=1010000000000000000

Therefore...

P (peta) is 10^15
T (tera) is 10^12
G (giga) is 10^9
M (mega) is 10^6

These values in sieving represent the size of the factors that are being used to see if they divide any of the candidates. For example, this can be found in the factor file produced by the sieve:

1000038351397 | 121*2^8946564+1

This means that 1000038351397 divides 121*2^8946564+1. This factor was found while sieving the 1T to 2T range. Therefore, you would expect factors to be between 1*10^12 to 2*10^12.

http://en.wikipedia.org/wiki/SI_prefix#List_of_SI_prefixes
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valterc
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Message 20601 - Posted: 28 Jan 2010 | 12:10:02 UTC - in response to Message 16483.

I'm just starting to do some manual sieving. I reserved 1G in the reservation thread for the factorial sieve...

The last reservation was "Reserving 1430G-1431G". I guessed that the next one available were 1432G-1433G. So I did.

... or the right one were 1431G-1432G ?

StefanoD
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Message 20602 - Posted: 28 Jan 2010 | 12:28:43 UTC - in response to Message 20601.

1431G-1432G
Ma non ti preoccupare, qualcun altro riserverà quel range.

John M. Johnson "Novex"
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Message 20604 - Posted: 28 Jan 2010 | 14:27:50 UTC - in response to Message 20601.

I'm just starting to do some manual sieving. I reserved 1G in the reservation thread for the factorial sieve...

The last reservation was "Reserving 1430G-1431G". I guessed that the next one available were 1432G-1433G. So I did.

... or the right one were 1431G-1432G ?

If they reserved 1430G-1431G and you checked the posts at the bottom to make sure no other newer reserves haven't already taken the next few G's then the correct next one would be 1431G-1432G But you could do your 1431G-1433G. just lower it to the 1431G. If you wish :) hope that helps
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John M. Johnson "Novex"

valterc
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Message 20609 - Posted: 28 Jan 2010 | 16:04:20 UTC - in response to Message 20602.

1431G-1432G
Ma non ti preoccupare, qualcun altro riserverà quel range.

ok, thank you. next time I will do it better ;)

Message boards : Sieving : Need help to find out what sieving ranges are