20190516, 09:43  #56 
Feb 2003
3×5×127 Posts 
Please keep in mind that we use an overlap of just 10000.
The Perl script also uses this number as array size. That means that gaps larger than 10000 would be lost without further notification! Thus, as soon as you observe gap lengths of 8000 or higher, we need to adjust this number to a higher one (e.g. 15000 or 20000). 
20190516, 10:28  #57 
Feb 2003
3×5×127 Posts 
Just for your information:
The "technical" upper limit for the search as dictated by NewPGen would be k=9.2234e18 (equivalent to 5.534e19 in "real" numbers). I did a quick test run at this level (k=9e18) and found the script combo working properly up to this bound. 
20190516, 10:37  #58 
Feb 2003
3×5×127 Posts 
The test run revealed the following new gaps, luckily including one for 3016:
Code:
3016 9000000000206619002 3246 9000000000189953452 3270 9000000000039902107 3650 9000000000092227858 3770 9000000000022662393 3865 9000000000125118057 
20190516, 10:54  #59  
Feb 2003
3561_{8} Posts 
Quote:
Actually the limit on Windows would be lower: k=2.147e17 (= 2.147e9 * 1e8) due to the restriction of "kmin" and "kmax" to 32 bit (signed) integers. But we could cope with this restriction by switching to "units" of 1e10 for kmin and kmax. However, in order to avoid segmented sieving, the step size still needs to be 2e8. This would require a more sophisticated string handling for the loop processing, but should be easy to solve once we need it... Last fiddled with by Thomas11 on 20190516 at 11:07 Reason: Messed up the differnt powers of 10... 

20190516, 14:26  #60  
Feb 2003
3·5·127 Posts 
Quote:
Then I would like to start from 8000000. 

20190516, 14:33  #61 
Feb 2003
3·5·127 Posts 
Three new record gaps from the (current) upper bound of the Windows script:
Code:
4275 210000040694249670 4363 210000037721159782 4840 210000040389168323 
20190516, 15:30  #62  
Jun 2003
Oxford, UK
3523_{8} Posts 
Quote:
I've got to 2138278 and found 7 3000 gaps, but none of these is first instance. Last fiddled with by robert44444uk on 20190516 at 15:36 

20190516, 15:45  #63 
Feb 2003
11101110001_{2} Posts 

20190516, 15:53  #64 
Feb 2003
3·5·127 Posts 
This is a nice one:
Code:
3333 865501685832150 
20190516, 16:05  #65  
Jun 2003
Oxford, UK
3523_{8} Posts 
I'm wondering if for the perl function Math::Prime::Utils sieve_prime_cluster might be a solution to the size problem  also, it can be called from memory rather than from the written newpgen file
https://metacpan.org/pod/Math::Prime..._prime_cluster Took about 7 secs to spew 2e8 to 4e8 twins to screen. Quote:
Last fiddled with by robert44444uk on 20190516 at 16:12 

20190517, 01:54  #66 
Apr 2010
Over the rainbow
3·11·73 Posts 
just saying'
Code:
4905 9000382149988845 Last fiddled with by firejuggler on 20190517 at 02:02 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Gaps between maximal prime gaps  Bobby Jacobs  Prime Gap Searches  52  20200822 15:20 
I found a sieve to search all pairs of twin primes  Pietro Maiorana  Twin Prime Search  8  20190926 23:07 
find very easy twin prime in the infamy twin primes  hal1se  Miscellaneous Math  13  20181105 16:34 
Mersenne Primes p which are in a set of twin primes is finite?  carpetpool  Miscellaneous Math  3  20170810 13:47 
Gaps of Primes?  PawnProver44  Miscellaneous Math  10  20160410 19:32 