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 2009-01-19, 14:27 #23 gd_barnes     May 2007 Kansas; USA 1013210 Posts 1663*2^356015-1 is prime
2009-01-19, 14:57   #24
AMDave

Jan 2006
deep in a while-loop

65810 Posts

Quote:
 Originally Posted by gd_barnes Where'd all the NEW primes go?
Hundreds of them:
http://stats.ironbits.net/statsnew/p...st.php?a=reset
updated every hour - it will drive the mailer

Last fiddled with by AMDave on 2009-01-19 at 15:18

 2009-01-19, 20:19 #25 IronBits I ♥ BOINC!     Oct 2002 Glendale, AZ. (USA) 21318 Posts 1577*2^356616-1 is prime! confirmed
 2009-01-20, 00:12 #26 Flatlander I quite division it     "Chris" Feb 2005 England 31·67 Posts 1671*2^357110-1 is prime.
2009-01-20, 00:13   #27
gd_barnes

May 2007
Kansas; USA

22×17×149 Posts

Quote:
 Originally Posted by AMDave Hundreds of them: http://stats.ironbits.net/statsnew/p...st.php?a=reset updated every hour - it will drive the mailer

I meant new, as in reportable top-5000 primes, on the 8th drive.

I assume that the mailer knows not to send Emails on port 9000.

Thanks,
Gary

 2009-01-20, 00:16 #28 gd_barnes     May 2007 Kansas; USA 279416 Posts 1517*2^356384-1 is confirmed prime 1617*2^356462-1 is prime 1487*2^356506-1 is confirmed prime 1623*2^356936-1 is prime Very odd: Where'd all the k=1700-2000 primes go on the 8th drive? On the entire drive, we've had a total of 2 new primes and 1 confirmed prime for that range. For k=1400-1700, we've had multitudes of them. Gary Last fiddled with by gd_barnes on 2009-01-20 at 00:17
 2009-01-20, 17:47 #29 gd_barnes     May 2007 Kansas; USA 22×17×149 Posts 1403*2^359146-1 is confirmed prime 1609*2^359209-1 is prime I think k=1700-2000 is a nearly barren range! For n=350K to the current processing limit, we have: 23 total primes for k=1400-1700 3 total primes for k=1700-2000 This includes confirmed primes so is not biased by previous searching in any way. As Chris is fond of me saying: Primes are very strange! Gary
2009-01-20, 21:45   #30
Flatlander
I quite division it

"Chris"
Feb 2005
England

31·67 Posts

Quote:
 Originally Posted by gd_barnes 1403*2^359146-1 is confirmed prime 1609*2^359209-1 is prime I think k=1700-2000 is a nearly barren range! For n=350K to the current processing limit, we have: 23 total primes for k=1400-1700 3 total primes for k=1700-2000 This includes confirmed primes so is not biased by previous searching in any way. As Chris is fond of me saying: Primes are very strange! Gary
There's very strange and then there's really weird.
This sort of thing used to drive me nuts when I would do (semi)fixed n tests. Five primes for one n, then none for the next etc.

Last fiddled with by Flatlander on 2009-01-20 at 21:46

 2009-01-21, 02:52 #31 gd_barnes     May 2007 Kansas; USA 279416 Posts 1785*2^359725-1 is confirmed prime We've completed n=350K-360K minus some stragglers. The unofficial final count is: k=1400-1700 23 primes k=1700-2000 4 primes
 2009-01-21, 08:01 #32 gd_barnes     May 2007 Kansas; USA 22×17×149 Posts 1625*2^361306-1 is prime This is getting stranger by the minute: Now, in addition to the previous ridiculous ratio of k=1400-1700 vs. 1700-2000 primes, we have an unbelievable 9 CONSECUTIVE NEW primes for k=1600-1700!! Although this is a little biased towards the k=1600-1700 and 1800-2000 ranges that have had little searching done on them...9 consecutive in a k=100 range? Come on, what's going on here? Where are the k=1800-2000 primes as well as others from many k's that haven't been searched for k=1400-1600 & 1700-1800? Counting all primes to remove any bias from ones previously found, since n=350K, we now have: Code: k-value # primes 1400-1500 6 1500-1600 6 1600-1700 12 1700-1800 2 1800-1900 0 1900-2000 2 [There is a k=1800-1900 already-known prime in Ian's reserved manual range so finally the barren stretch there will be broken.] Not only are primes strange, they can be downright bizarre! It's things like this that lead one to conclude that primes are not random and is a large part of the reason that we search huge ranges of k and n all at once...to ultimately help decipher the "code" of primes. Gary Last fiddled with by gd_barnes on 2009-01-21 at 08:06
 2009-01-21, 12:43 #33 Mini-Geek Account Deleted     "Tim Sorbera" Aug 2006 San Antonio, TX USA 17·251 Posts What's the average weight (or combined weight or something) of the k's in 1600-1700 vs the other k=100 ranges? Also, I'd bet that if somebody worked the math out, this is bound to happen some time or another, just like GIMPS's two primes two weeks apart, which seems impossibly unlikely, but it worked out to be a decent probability over as much time as GIMPS has been around and assuming 1 prime/year (which they shouldn't 'expect', by prime heuristics, but they seem to be in a dense area of Mersennes).

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