k=9267 completed to n=4M, need more sieving files.
Results attached.

Status for Sierpinski even n's
 

Hi,

Here is my status today :

k = 23451 is tested up to n = 2,246,684 base two, no prime, continuing...
k = 60849 is tested up to n = 2,200,266 base two, no prime, continuing...

Regards,
Jean

P.S. I am now using sr2sieve-x86_64-linux and the two files are now sieved up to 118.74 T

Sierpinski even n's ; Presieved files updated
 

Hi,

Here is my status today :

k = 23451 is tested up to n = 2,302,304 base two, no prime, continuing...
k = 60849 is tested up to n = 2,250,234 base two, no prime, continuing...


Regards,
Jean

P.S. The two files are now sieved up to 132.69 T
Other active Liskovets-Gallot presieved files are now updated on :
[url]http://jpenne.free.fr/ConjRus/[/url]
They are sieved up to 75.32 T

Sierpinski even n's
 

Hi,

Here is my status today :

k = 23451 is tested up to n = 2,408,228 base two, no prime, continuing...
k = 60849 is tested up to n = 2,348,934 base two, no prime, continuing...


Regards,
Jean
P.S. The two files are now sieved up to 163.60 T

Sierpinski odd n's counterparts for 23451 and 60849
 

Hi,

To satisfy my curiosity, I am also sieving and testing these two k values for odd n's. For now, my results follow :

23451*2^n+1 is prime for odd n's :

43,75,147,163,197,203,709,973,1503,20635,32333,36045,42623,67103,186837,215203

60849*2^n+1 is prime for odd n's :

9,129,147,181,225,337,549,597,1177,1327,2685,11019,18397,19539,66889,77959,90405,95647,97497,246691

All these primes are now too small to be archived, but one of them had been archived in 2001 :

60849*2^90405+1 g182, McElhatton, Proth.exe, March 2001, 27220 digits.

Regards,
Jean

[QUOTE=Jean Penné;336121]Hi,

To satisfy my curiosity, I am also sieving and testing these two k values for odd n's. For now, my results follow :

23451*2^n+1 is prime for odd n's :

43,75,147,163,197,203,709,973,1503,20635,32333,36045,42623,67103,186837,215203

60849*2^n+1 is prime for odd n's :

9,129,147,181,225,337,549,597,1177,1327,2685,11019,18397,19539,66889,77959,90405,95647,97497,246691

All these primes are now too small to be archived, but one of them had been archived in 2001 :

60849*2^90405+1 g182, McElhatton, Proth.exe, March 2001, 27220 digits.

Regards,
Jean[/QUOTE]

08/04/13 :
60849*2^390015+1 is prime! (117411 decimal digits) Time : 637.580 sec.

[QUOTE=Jean Penné;336760]08/04/13 :
60849*2^390015+1 is prime! (117411 decimal digits) Time : 637.580 sec.[/QUOTE]

Every time I see you post in this thread I'm hoping to see that you found a prime for one of those two k. I see you found one, but not for an even n. :ick:

even n's / odd n's for the two k's
 

[QUOTE=rogue;336765]Every time I see you post in this thread I'm hoping to see that you found a prime for one of those two k. I see you found one, but not for an even n. :ick:[/QUOTE]
I am now sieving and testing (separately) k = 23451 and k = 60849 both for even and for odd n's, because I think it is interesting to see the strong dissymetry on the results... But I will be now more explicit while presenting these results, to avoid you to be disappointed!
Regards,
Jean

[QUOTE=unconnected;322255]k=9267 completed to n=4M, need more sieving files.
Results attached.[/QUOTE]

Ian,

Can you send Dmitry a PrimeGrid sieve file for Sierp base 2 k=9267 for n=4M-6M? If you can filter out only the odd n, that would help him but if not, I'm sure that he could do that. Even if PrimeGrid is still sieving it, it's probably sieved more than any file that we have.

Thanks!


Gary

[QUOTE=gd_barnes;338679]Ian,

Can you send Dmitry a PrimeGrid sieve file for Sierp base 2 k=9267 for n=4M-6M? If you can filter out only the odd n, that would help him but if not, I'm sure that he could do that. Even if PrimeGrid is still sieving it, it's probably sieved more than any file that we have.[/QUOTE]

Ian, I have a special version of srfile that can extract all n for a list of k from PrimeGrid's files. It isn't smart enough to remove odd or even n all at once, but it could do that with a couple of extra steps.

[QUOTE]
Can you send Dmitry a PrimeGrid sieve file for Sierp base 2 k=9267 for n=4M-6M? If you can filter out only the odd n, that would help him but if not, I'm sure that he could do that. Even if PrimeGrid is still sieving it, it's probably sieved more than any file that we have.
[/QUOTE]

I'm not sure I have the latest file but I'm sure it's available at Lennart's site.

[QUOTE]Ian, I have a special version of srfile that can extract all n for a list of k from PrimeGrid's files. It isn't smart enough to remove odd or even n all at once, but it could do that with a couple of extra steps. [/QUOTE]

Thanks Mark, but I have a homegrown script for doing the extract and the odd n's. It's amazing what you accumulate over the years.