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Old 2008-02-15, 01:16   #45
kar_bon
 
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even Riesel:
k=14361, 19401 and 20049 at n=300k (even)
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Old 2008-02-18, 17:27   #46
Jean Penné
 
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Default 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
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Old 2008-02-18, 18:23   #47
Jean Penné
 
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Default 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
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Old 2008-02-18, 20:16   #48
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Quote:
Originally Posted by Jean Penné View Post
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
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Old 2008-02-18, 22:02   #49
Jean Penné
 
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Default Yes, I forgot it!

Quote:
Originally Posted by gd_barnes View Post
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
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Old 2008-02-19, 15:24   #50
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Default k = 39687 now tested up to 256K (Riesel odd n's)

Quote:
Originally Posted by Jean Penné View Post
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
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Old 2008-02-19, 20:59   #51
Jean Penné
 
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Default 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
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Old 2008-02-20, 16:39   #52
Jean Penné
 
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Default 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
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Old 2008-02-20, 17:01   #53
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Quote:
Originally Posted by Jean Penné View Post
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
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Old 2008-02-20, 17:39   #54
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Quote:
Originally Posted by gd_barnes View Post
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
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Old 2008-02-24, 19:26   #55
Jean Penné
 
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Default 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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