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drummers-lowrise
1) Message boards : Number crunching : hey! a more efficient sieve for b*2^k+1 (Message 155200)
Posted 67 days ago by JimBProject donor
It was either sr1sieve or sr2sieve. I can't find the spiral notebooks I used at the time.
2) Message boards : Number crunching : hey! a more efficient sieve for b*2^k+1 (Message 155198)
Posted 67 days ago by JimBProject donor
21181*2^37598180+1 is divisible by 3799647223
3) Message boards : News : 321 Sieve is over (Message 145197)
Posted 594 days ago by JimBProject donor
They've never deleted automatically for me. Feel free to delete it.
4) Message boards : Seventeen or Bust : Seventeen or Bust and the Sierpinski Problem (Message 140777)
Posted 746 days ago by JimBProject donor
The WU currently has 10 tasks of which 2 (as mentioned) have led to a (maybe wrong) result. The maximum is 15 resp. 5.

Except that if it hits 15 it will be changed to some much higher number, I believe 99.
5) Message boards : General discussion : Menu structure (Message 140776)
Posted 746 days ago by JimBProject donor
The certificate and user search are available from Your Account page. The user search is called "Find Friends" and is on the right side near the top. The certificate is just above the "other projects you particiate in" list.
6) Message boards : 321 Prime Search : Only GPUs tasks (Message 140529)
Posted 759 days ago by JimBProject donor
Better yet, uncheck the Use CPU box near the top, otherwise 321 Sieve will be autoselected again.
7) Message boards : Number crunching : Mega Primes Stat Charts (Message 139933)
Posted 793 days ago by JimBProject donor
The official announcement says: The prime was verified internally using an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 32GB RAM, running Linux Debian.

Otherwise known as http://www.primegrid.com/show_host_detail.php?hostid=990999
8) Message boards : Sierpinski/Riesel Base 5 Problem : SR5 primes may take up to 10 times longer to process than composites (Message 139067)
Posted 831 days ago by JimBProject donor
I just realized we hadn't said anything about credit. Because we know an SR5 prime in the form k*5^n+1 takes twice as long, we give twice the BOINC credit. For an SR5 prime in the form k*5^n-1 we give 5x the normal credit. So nobody is missing out on credit for discovering a conjecture prime (if that would even bother anyone in the first place).
9) Message boards : Sierpinski/Riesel Base 5 Problem : SR5 primes may take up to 10 times longer to process than composites (Message 139044)
Posted 833 days ago by JimBProject donor
This is what they look like if you run them manually:

jim@ps2:~/test$ ./c -d -t4 -q"146264*5^2953282-1" Base prime factor(s) taken : 5 Starting N+1 prime test of 146264*5^2953282-1 Using FMA3 FFT length 720K, Pass1=320, Pass2=2304, clm=4, 4 threads, a = 3 146264*5^2953282-1 may be prime. Starting Lucas sequence... Using FMA3 FFT length 720K, Pass1=320, Pass2=2304, clm=4, 4 threads, P = 4 146264*5^2953282-1 may be prime, trying to compute gcd's U((N+1)/5) is coprime to N! 146264*5^2953282-1 is prime! (2064261 decimal digits, P = 4) Time : 23182.986 sec.
10) Message boards : Problems and Help : Task in progress but won't show up in app (Message 138974)
Posted 836 days ago by JimBProject donor
It has now timed out and will be sent to someone else. This can happen sometimes that the system thinks you have a job when you don't, especially if your internet connection is flaky. Don't worry about it, this is what BOINC does. There was no human interaction required and it's not counted against you in any way.


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