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-   -   17*2^n-1 (https://www.mersenneforum.org/showthread.php?t=5813)

Retep 2010-06-27 09:02

I asked for a range 5 days ago and have not yet received one.
It also took a few days the last time.

I suggest the process of giving out ranges could be optimized. Could the files be saved somewhere to be available for download?

This would be nice, because the process is way too slow for me at the moment.

amphoria 2010-06-27 10:22

1 Attachment(s)
As Kosmaj appears to be busy I have attached 2500-2540 for you. Normally this would not be an option but I hold the master sieve file for k=17.

Retep 2010-06-27 19:16

1 Attachment(s)
Thanks @amphoria

2440-2464 finished, no primes (file attached).

Starting with 2464-2480 and 2500-2540.

unconnected 2010-06-28 11:57

Reserving 2480-2500.

Kosmaj 2010-07-10 08:49

Test files starting from n=2540k are now available from the first post of the thread. I realized that everybody prefers larger files, so they are now in chunks of 5k, instead of 2k before.

All candidates sieved to 200T by courtesy of Amphoria.

henryzz 2010-07-10 10:45

[quote=Kosmaj;220972]Test files starting from n=2540k are now available from the first post of the thread. I realized that everybody prefers larger files, so they are now in chunks of 5k, instead of 2k before.

All candidates sieved to 200T by courtesy of Amphoria.[/quote]
Why not post a large file and let people split off what they want themselves like NPLB and CRUS?

Kosmaj 2010-07-10 12:02

Because we prefer this way.

amphoria 2010-07-22 15:56

Taking 2540-2550.

Retep 2010-08-08 16:44

1 Attachment(s)
2464-2480 and 2500-2540 finished, no primes (file attached).

Taking 2550-2590.

Retep 2010-08-08 22:38

If we know the sieve depth and the number of the remaining candidates it is possible to approximately calculate the probability of at least one prime between
2,550,000 and 3,000,000
and also
2,550,000 and 4,000,000.

There is a thread in this forum which shows how to determine this. I would be interested in the result, if someone who has information about sieve depth and number of candidates could calculate it.

VBCurtis 2010-08-09 00:23

Retep-
I don't have the data, but you do, at least roughly. The sieve depth is in the header of the files you have tested, and you can count the number of candidates per 50k in the blocks you've tested and extrapolate to number of candidates in the ranges you are interested in.

If the sieve P-value is not in the header, it is likely listed in post #1 of this thread- Kosmaj updates that part.
-Curtis


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