Archived sieve reservations and discussions

[gribozavr]

I've downloaded and verified all files.

200T-300T complete. Taking 605T-700T.

[Oddball]

590T-600T complete, about 19100 factors found:

http://www.sendspace.com/file/siv23n

gribozavr, could you upload the small k file (k<100000 for n=480K-481K)? I'm going to do some LLR tests for a change.

edit: as a reminder, please make sure that there are no factors < 600T for the small k file.

[MooMoo2]

Reserving 700T-705T.

[MooMoo2]

700T-705T complete, 7875 factors found:

http://www.sendspace.com/file/28mech

[mdettweiler]

600T-605T complete, 9279 factors: http://www.sendspace.com/file/5trh5z

Resrerving 705T-710T.

[gribozavr]

480000-484999_09dec2010.zip http://www.sendspace.com/file/uy637c

Stats (number of k's):
18013514 480000-484999_30aug2010.txt
16904938 480000-484999_09dec2010.txt
6.15% removed

Small k file for LLR:
n_481500-484899__k_1_100000__28nov2010.txt http://www.sendspace.com/file/ul26bb

[gribozavr]

I've downloaded and verified all files. 480000-484999_30aug2010.txt and n_480000-480999__k_1_100000__30aug2010.txt have all those factors removed.

[mdettweiler]

705T-710T complete, 7954 factors: http://www.sendspace.com/file/4c5q6w

Reserving 710T-715T.

[MooMoo2]

I was originally planning to do some LLR, but seeing Oddball test thousands of candidates without finding any primes has been truly discouraging. Oh well, I guess I'll sieve instead.

Reserving 715T-720T.

[mdettweiler]

Originally Posted by MooMoo2

I was originally planning to do some LLR, but seeing Oddball test thousands of candidates without finding any primes has been truly discouraging. Oh well, I guess I'll sieve instead.

At this sieve depth (605T contiguous) and n- and k-level, the odds of finding a (non-twin) prime on a given candidate are 1 in 5490--that is, one would expect a prime about every 5490 candidates. The odds of finding one prime in the n=480071-480200 range currently loaded into the PRPnet server (4645 candidates) are about 57%. So it's a little better than a toss-up that there will be at least one prime found within the next few days at current processing rates.

How many cores do you have? Oddball's got 6, but you can still crank out a decent amount of pairs (enough to likely get a prime within a couple of weeks) with 4 or even 2 cores. With 1 core it would take a bit longer, but a prime is still not attainable.

Note that despite all my above words to encourage you that finding a prime isn't really impossible , it actually is better in the long run to sieve instead at this time. We're still quite a ways from optimal depth at p=6P, so running LLR tests right now is not really the most efficient way to go. (It's more to break the monotony of sieving than anything else. )

[10metreh]

Originally Posted by mdettweiler

With 1 core it would take a bit longer, but a prime is still not attainable.

A "not" seems to have sneaked into your post.