20210106, 13:36  #441 
"Mark"
Apr 2003
Between here and the
2^{2}×5×17×19 Posts 
I cannot access http://chesswanks.com/num/a094133.html.

20210107, 08:52  #442 
Sep 2010
Weston, Ontario
2^{2}·3·17 Posts 
Thank you. I had some wifi issues yesterday that interrupted the communication effort with my Macmini farm. In particular, one machine would not let me in over the network. In the past I have solved this by directly connecting (USBC or crossover ethernet) an obstinate mini to my main computer but this time that did not work. As all of my minis are monitored via screen sharing, I ended up having to haul my living room TV to the mini (I did not want to do the reverse because I would have to unplug it and that would cease its current calculations). Bottom line: after I rebooted the mini's wifi I forgot to plug the ethernet cable back into my main machine (which hosts chesswanks).
Interval #18 has roughly twice as many terms (all of them larger) than did #17 (which took about six weeks to finish @ 30 cores). I'm currently idling (sieving and working on the largestLeylandprime hunt) those minis that are not engaged in doing intervals #23 and #24. That way when I do #18 I will use all of my minis for the task and (hopefully) keep the compute time down. 
20210123, 00:39  #443 
Sep 2010
Weston, Ontario
2^{2}×3×17 Posts 
I have examined all Leyland numbers in the gap between L(49878,755) <143547> and L(144999,10) <145000> and found 20 new primes.

20210123, 13:30  #444 
"Norbert"
Jul 2014
Budapest
110_{10} Posts 
Another new PRP:
27953^28198+28198^27953, 125381 digits. 
20210124, 17:34  #445 
Sep 2010
Weston, Ontario
2^{2}×3×17 Posts 
I have examined all Leyland numbers in the gap between L(144999,10) <145000> and L(145999,10) <146000> and found 7 new primes.
I started interval #18 yesterday. It may be another three days before I can devote all of my cores to the task, as a couple of them are still finishing up previous assignments. I have a very provisional completion date of March 10. 
20210130, 11:37  #446 
"Norbert"
Jul 2014
Budapest
2·5·11 Posts 
Another new PRP:
28203^28352+28352^28203, 126175 digits. 
20210205, 19:04  #447 
"Norbert"
Jul 2014
Budapest
2·5·11 Posts 
Another new PRP:
28340^28503+28503^28340, 126907 digits. 
20210225, 12:29  #448 
"Norbert"
Jul 2014
Budapest
110_{10} Posts 
Another new PRP:
28781^28930+28930^28781, 129002 digits. 
20210225, 21:38  #449 
Sep 2010
Weston, Ontario
314_{8} Posts 
It looks like I overestimated this by a week or so. In fact, a couple of my processors have already finished their assigned ranges and I have wasted no time getting them started on interval #19.

20210228, 18:26  #450 
"Norbert"
Jul 2014
Budapest
1101110_{2} Posts 
Another new PRP:
28659^28988+28988^28659, 129208 digits. 
20210301, 18:16  #451 
Sep 2010
Weston, Ontario
2^{2}·3·17 Posts 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Leyland Primes: ECPP proofs  Batalov  XYYXF Project  20  20211107 20:36 
Mersenne Primes p which are in a set of twin primes is finite?  carpetpool  Miscellaneous Math  3  20170810 13:47 
Distribution of Mersenne primes before and after couples of primes found  emily  Math  34  20170716 18:44 
On Leyland Primes  davar55  Puzzles  9  20160315 20:55 
possible primes (real primes & poss.prime products)  troels munkner  Miscellaneous Math  4  20060602 08:35 