mersenneforum.org Riesel/Sierp base 2 even-k/even-n/odd-n testing
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 2008-02-15, 01:16 #45 kar_bon     Mar 2006 Germany 2×3×52×19 Posts even Riesel: k=14361, 19401 and 20049 at n=300k (even)
 2008-02-18, 17:27 #46 Jean Penné     May 2004 FRANCE 24·5·7 Posts Another Riesel base 2 - odd n prime. On 01/02/2008, I found : 288234*2^224976-1 is prime! Time : 290.692 sec. which is 144117*2^224977-1 Now, only 16 k's are remaining All these remaining k's have been tested at least up to n = 256K (262144). Jean
 2008-02-18, 18:23 #47 Jean Penné     May 2004 FRANCE 23016 Posts New status for Riesel base 2 odd n From "regular" primes thread : 288234*2^224976-1 is prime! Time : 290.692 sec. which is 144117*2^224977-1 Now, only 16 k's are remaining Also, I reached the 256K limit for : k = 133977, n = 262029, no prime k = 145257, n = 261781, no prime k = 147687, n = 261881, no prime k = 148323, n = 262079, no prime k = 154317, n = 262065, no prime k = 155877, n = 262085, no prime So, I am unreserving these k's for now (but perhaps would reserve some of them later...). Regards, Jean
2008-02-18, 20:16   #48
gd_barnes

May 2007
Kansas; USA

11·929 Posts

Quote:
 Originally Posted by Jean Penné On 01/02/2008, I found : 288234*2^224976-1 is prime! Time : 290.692 sec. which is 144117*2^224977-1 Now, only 16 k's are remaining All these remaining k's have been tested at least up to n = 256K (262144). Jean
Jean,

Welcome back from vacation! It's always nice to come back to a prime.

Per a previous posting, I show k=39687 only tested to n=253.1K. Is that correct?

Thanks,
Gary

Last fiddled with by gd_barnes on 2008-02-18 at 20:30 Reason: Remove reservation question answered in other post

2008-02-18, 22:02   #49
Jean Penné

May 2004
FRANCE

10608 Posts
Yes, I forgot it!

Quote:
 Originally Posted by gd_barnes Jean, Welcome back from vacation! It's always nice to come back to a prime. Per a previous posting, I show k=39687 only tested to n=253.1K. Is that correct? Thanks, Gary
You are perfectly right, Gary, I forgot to complete this one!!
I am restarting it now from this point...

Thanks,
Jean

2008-02-19, 15:24   #50
Jean Penné

May 2004
FRANCE

24×5×7 Posts
k = 39687 now tested up to 256K (Riesel odd n's)

Quote:
 Originally Posted by Jean Penné You are perfectly right, Gary, I forgot to complete this one!! I am restarting it now from this point... Thanks, Jean
Completed :
k = 39687, n = 261837, no prime...

so, I am also unreserving this k for now.
I shall now try to make some further sieving on the 16 remaining k's...
Regards,
Jean

 2008-02-19, 20:59 #51 Jean Penné     May 2004 FRANCE 24×5×7 Posts New status for Sierpinski base 2 - even n's Here is to-day's status for Sierpinski base 2 - even n's (which is half of remaining k's for Sierpinski base 4) : k = 23451 is up to n = 1,977,272 no prime... k = 60849 is up to n = 1,940,034 no prime... Regards, Jean
 2008-02-20, 16:39 #52 Jean Penné     May 2004 FRANCE 24·5·7 Posts Riesel base 2 odd n's sieving ; reserving one k I am now sieving the 16 remaining k's for Riesel base 2 odd n's (in conjonction with Riesel base 4) from n = 256K to 2048K base 2, using srsieve, and shall distribute the sieve files in Newpgen format when sieved enough(at least p = 100 billions)... For now, I wish to reserve again k = 155877 (in conjonction with k = 311754 for base 4) for LLR testing up to n = 512K (524288) base 2, or, I hope, prime found below... Regards, Jean
2008-02-20, 17:01   #53
gd_barnes

May 2007
Kansas; USA

1021910 Posts

Quote:
 Originally Posted by Jean Penné I am now sieving the 16 remaining k's for Riesel base 2 odd n's (in conjonction with Riesel base 4) from n = 256K to 2048K base 2, using srsieve, and shall distribute the sieve files in Newpgen format when sieved enough(at least p = 100 billions)... For now, I wish to reserve again k = 155877 (in conjonction with k = 311754 for base 4) for LLR testing up to n = 512K (524288) base 2, or, I hope, prime found below... Regards, Jean
Great! The sieve files help a lot. Perhaps we'll can make a mini-drive out of it.

Do you know that I tested Riesel base 2 odd-n k=6927 to n=600K base 2? That was done in conjuction with Riesel base 4 k=13854 to n=300K base 4. But if you want to include the range as a double-check in your sieved file(s), that works for me.

Gary

2008-02-20, 17:39   #54
Jean Penné

May 2004
FRANCE

23016 Posts

Quote:
 Originally Posted by gd_barnes Great! The sieve files help a lot. Perhaps we'll can make a mini-drive out of it. Do you know that I tested Riesel base 2 odd-n k=6927 to n=600K base 2? That was done in conjuction with Riesel base 4 k=13854 to n=300K base 4. But if you want to include the range as a double-check in your sieved file(s), that works for me. Gary
Yes, I know that, and it is great! We may use the corresponding sieved file for double-checking, or starting after your upper limit...

Jean

 2008-02-24, 19:26 #55 Jean Penné     May 2004 FRANCE 56010 Posts Riesel base 2 odd n's ; reserving another k. I wish to reserve k = 39687 (in conjonction with k = 79374 for base 4) for LLR testing up to n = 512K (524288) base 2, or, I hope, prime found below... Jean P.S. My sieving is progressing fine...

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