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-   -   Sieving for CRUS (https://www.mersenneforum.org/showthread.php?t=20743)

lalera 2016-09-02 12:14

1 Attachment(s)
hi,
here is a sieve-file for R102
n= 100k to 200k
sieved to 7T

lalera 2016-09-06 09:39

hi,
the following range is done
S106 n= 25k to 100k
sieved to 7T
results emailed

lalera 2016-09-06 11:22

hi,
did you look at the conjecture of R15 ?
[URL="http://www.noprimeleftbehind.net/crus/tab/CRUS_tab.htm"]http://www.noprimeleftbehind.net/crus/tab/CRUS_tab.htm[/URL]
... around 36T k´s ...
maybe i should do a range from k=10M to ?M, n=to 25k with the script
and openpfgw first

rebirther 2016-09-06 11:50

[QUOTE=lalera;441715]hi,
did you look at the conjecture of R15 ?
[URL]http://www.noprimeleftbehind.net/crus/tab/CRUS_tab.htm[/URL]
... around 36T k´s ...
maybe i should do a range from k=10M to ?M, n=to 25k with the script
and openpfgw first[/QUOTE]

Hmm, I missed that part, there are a lot left, can you do the current range for the last 14k's at k<10M?

lalera 2016-09-06 12:22

[QUOTE=rebirther;441717]Hmm, I missed that part, there are a lot left, can you do the current range for the last 14k's at k<10M?[/QUOTE]

hi,
yes i will do

lalera 2016-09-06 12:23

hi,
reserving R15 n=200k-400k to sieve for BOINC

gd_barnes 2016-09-06 14:07

I would suggest against testing k>10M on R15 at this point. We are unlikely to get all k tested on it in the foreseeable future. Testing k<10M to n=400K is fine. Some bases are just not worth attempting to test all k's.

lalera 2016-09-06 14:27

[QUOTE=gd_barnes;441725]I would suggest against testing k>10M on R15 at this point. We are unlikely to get all k tested on it in the foreseeable future. Testing k<10M to n=400K is fine. Some bases are just not worth attempting to test all k's.[/QUOTE]

hi,
ok, thank you

VBCurtis 2016-09-06 16:37

[QUOTE=gd_barnes;441725]I would suggest against testing k>10M on R15 at this point. We are unlikely to get all k tested on it in the foreseeable future. Testing k<10M to n=400K is fine. Some bases are just not worth attempting to test all k's.[/QUOTE]

k = 2^31 is a natural bound for these monster bases, as that's the limit for using sr2sieve. There's a reasonable argument for running the script on R7 and R15 to 2^31 (or just 2e9 for bookkeeping cleanliness), to maximize the use of sr2sieve; such an effort could reach top-5000 level somewhat efficiently.

I agree with Gary that it's ridiculous to contemplate testing all k's for R7 or R15, but I'm interested in testing to 2^31- I'll help with sieving if Lalera et al wish to proceed.

lalera 2016-09-06 17:02

[QUOTE=VBCurtis;441744]k = 2^31 is a natural bound for these monster bases, as that's the limit for using sr2sieve. There's a reasonable argument for running the script on R7 and R15 to 2^31 (or just 2e9 for bookkeeping cleanliness), to maximize the use of sr2sieve; such an effort could reach top-5000 level somewhat efficiently.

I agree with Gary that it's ridiculous to contemplate testing all k's for R7 or R15, but I'm interested in testing to 2^31- I'll help with sieving if Lalera et al wish to proceed.[/QUOTE]

i will proceed later with R7 and R15
at this time i have no free resources
feel free to sieve R7 and R15

for sr2sieve
For sequences k*b^n+/-1 and prime factor p, the following limits apply:

1 < k < 2^32.
1 < b < 2^32.
core(k)*core(b) < 2^31. (core(k) is the squarefree part of k).
0 < n < 2^32.
k,b < p < 2^52. (or 2^62 for x86/x86-64 builds, or 2^63 for ppc64).
(taken from the readme)
k=up to 4e9

lalera 2016-09-06 20:51

hi,
the following range is done
R145
n= 25k to 100k
sieved to 7T
results emailed


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