Bases 2 & 4 reservations/statuses/primes

[Jean Penné]

Congrats to Karsten for the last Riesel base 2 odd n prime discovered :

147687*2^843689-1 253981 L550 Jan 2009

http://primes.utm.edu/bios/code.php?code=L550

Now 18 primes are remaining to be found, to prove the four conjectures...
And the sieving of the 10 remaining Riesel base 2 files runs now at more than 472,000 p's per second!

Regards,
Jean

[Jean Penné]

Hi,

Riesel odd n's :

k = 39687 is up to n = 1250277, no prime...

k = 155877 is up to n = 1000841, no prime...

I am now releasing these two stubborn k's, and wish to reserve two k's for Sierpinski odd n's, starting to 800K base 2 :

k = 53133 and k = 85287

The presieved files are now updated on my site :

http://jpenne.free.fr/ConjRus/

The Riesel files are sieved up to 10.4 Tera
The Sierpinski files are sieved up to 5.68 Tera
Regards,
Jean

[Jean Penné]

Hi,

Sierpinski odd n's :

k = 53133 is up to n = 1128621, no prime...

k = 85287 is up to n = 1013507, no prime...

I am now releasing these two stubborn k's, and wish to reserve two other k's for Sierpinski odd n's, starting to 800K base 2 :

k = 60357 and k = 84363

The presieved files are now updated on my site :

http://jpenne.free.fr/ConjRus/

The Riesel files are sieved up to 10.4 Tera
The Sierpinski files are sieved up to 6.69 Tera
Regards,
Jean
P.S. Please, Karsten, would you update the Liskovets-Gallot page in RPS accordingly (the reservation status is not up-to-date) ? Thank you by advance!

[kar_bon]

Originally Posted by Jean Penné

P.S. Please, Karsten, would you update the Liskovets-Gallot page in RPS accordingly (the reservation status is not up-to-date) ? Thank you by advance!

just done!

later today i'll give a status of my work on here.

[Jean Penné]

Originally Posted by kar_bon

just done!

later today i'll give a status of my work on here.

Thank you very much, Karsten!

A remark about Sierpinski odd n's :

I observe that k = 32247 is still showed at n = 1780000 base 2...
But it is really completed by the Conjecture R'us project to n = 2M :

please see http://www.mersenneforum.org/showthread.php?t=9878 post n°5

Best Regards,
Jean

[kar_bon]

Originally Posted by Jean Penné

I observe that k = 32247 is still showed at n = 1780000 base 2...
But it is really completed by the Conjecture R'us project to n = 2M :

thanks, corrected that.

my stats:

Riesel even (k=14361,19401,20049) at n=1126000 base 2

Riesel odd (k=103947,154317,163503) at n=968000 base 2

[Jean Penné]

Hi,

Sierpinski odd n's :

k = 60357 is up to n = 1049415, no prime...

k = 84363 is up to n = 1055657, no prime...

I am now releasing these two stubborn k's, and wish to work again on k = 85287 starting to 1013507 base 2 and intending to go up to 1Mbits...

The presieved files are now updated on my site :

http://jpenne.free.fr/ConjRus/

The Sierpinski files are sieved up to 8 Tera
Regards,
Jean

[Jean Penné]

Hi,
I am now working again on k = 155877, intending to go up to 1Mbit n (base 2).
Regards,
Jean

[Jean Penné]

Hi,

Sierpinski odd n's :

k = 85287 is up to n = 1065947 base 2, no prime, releasing this k...

Riesel odd n's :

k = 155877 is up to n = 1049525 base 2, no prime, releasing this k...

Riesel even n's :

Working again on k = 9519 starting to n = 1450216 base 2
(the file is sieved up to 10 Tera...)
I hope to find a prime before reaching n = 2M base 2...
Regards,
Jean

[gd_barnes]

Karsten,

Have you had any progress since April on your 6 reserved k's here?


Thanks.

[kar_bon]

Originally Posted by gd_barnes

Have you had any progress since April on your 6 reserved k's here?

not much effort done, because those 6 k's are running on a quite slow machine, but still working on them.