Bases 2 & 4 reservations/statuses/primes - Page 13

gd_barnes · 2008-06-26, 09:23

Riesel base 2 odd-n k=39687, 133977, and 155877 are now complete to n=800K; no primes. I am now unreserving these.

Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are now at n=735K; no primes. Continuing on to n=800K.

Very stubborn k's!

Gary

gd_barnes · 2008-06-27, 04:34

Riesel base 4 k=19464 is at n=490K; no primes; continuing on to n=500K.

Sierp base 12 k=404 is at n=158K; no primes; continuing on to n=250K.

Gary

gd_barnes · 2008-06-28, 09:48

Riesel base 4 k=19464 complete to n=500K (n=1M base 2). No primes. This one promises to be a huge challenge to find a prime on. It is the only k-value remaining for this base that is a multiple of the base and it is extremely low-weight. k=19464/4=4866 had a prime at n=1 but unfortunately the prime for k=19464 at n=0 doesn't count.

I'm now releasing this k and adding a 2nd core to my new Riesel base 256 effort.

Gary

gd_barnes · 2008-07-04, 01:27

Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are at n=772K; no primes. Continuing to n=800K.

gd_barnes · 2008-07-10, 06:36

Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are complete to n=800K; no primes.

I'm now unreserving these stubborn k's.

Jean Penné · 2008-07-28, 16:14

Hi,

Riesel even n's :

k = 9519 is up to n = 1138936, no prime, continuing...

Riesel odd n's :

k = 148323 is up to n = 1023383, no prime, continuing...

These k's are stubborn, so, I will probably give up on them if no prime found at end of summer time...

I updated to-day the presieved files on my site :

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

Active Riesel files are sieved up to 4187.03 billions.

Active Sierpinski files are sieved up to 2007.69 billions.

Regards,
Jean

gd_barnes · 2008-07-28, 22:06

Quote:

Originally Posted by Jean Penné

Hi,

Riesel even n's :

k = 9519 is up to n = 1138936, no prime, continuing...

Riesel odd n's :

k = 148323 is up to n = 1023383, no prime, continuing...

These k's are stubborn, so, I will probably give up on them if no prime found at end of summer time...

I updated to-day the presieved files on my site :

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

Active Riesel files are sieved up to 4187.03 billions.

Active Sierpinski files are sieved up to 2007.69 billions.

Regards,
Jean

Thanks for the great sieving Jean! Very helpful!

If there is one thing that I have found with all bases that are powers of 2: The k's are tough to find primes for! Bases like 3, 6, 7, 9, and 31 are easy to find primes but not bases 2, 4, 8, 16, 32, etc. Many factors for the various n-values make for few candidates to search.

Gary

kar_bon · 2008-09-09, 09:09

even Riesel:
k=175567 to 763k, no prime
k=239107 to 1.103M, no prime

Liskovets, Riesel even n:
3 k's at 444k, no prime

Liskovets, Riesel odd n:
6 k's at 443k, no prime

continuing all.
will give the Liskovets-k's a boost on my Quad the next days!

Jean Penné · 2008-09-10, 20:02

Hi,

Riesel even n's :

k = 9519 is up to n = 1255696, no prime, continuing...

Riesel odd n's :

k = 148323 is up to n = 1134543, no prime, continuing...

I updated to-day the presieved files on my site :

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

Active Riesel files are sieved up to 5644.99 billions.

Active Sierpinski files are sieved up to 2903.66 billions.

Regards,
Jean

Jean Penné · 2008-11-04, 20:50

Hi,

Riesel even n's :

k = 9519 is up to n = 1397376, no prime, continuing...

Riesel odd n's :

k = 148323 is up to n = 1166271, no prime, continuing...

I updated to-day (04/11/2008) the presieved files on my site :

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

Active Riesel files are sieved up to 7211.34 billions.

Active Sierpinski files are sieved up to 4020.12 billions.

Regards,
Jean

kar_bon · 2008-11-17, 10:50

another k less to prove the conjecture:

Riesel odd n:
106377*2^475569-1 is prime

all (now 5) odd k's reserved by me at n=490k!

2008-06-26, 09:23	#133
gd_barnes May 2007 Kansas; USA 101×103 Posts	Status Riesel base 2 odd-n k=39687, 133977, and 155877 are now complete to n=800K; no primes. I am now unreserving these. Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are now at n=735K; no primes. Continuing on to n=800K. Very stubborn k's! Gary

2008-06-27, 04:34	#134
gd_barnes May 2007 Kansas; USA 24243₈ Posts	Riesel base 4 k=19464 is at n=490K; no primes; continuing on to n=500K. Sierp base 12 k=404 is at n=158K; no primes; continuing on to n=250K. Gary Last fiddled with by gd_barnes on 2008-06-27 at 04:35

2008-07-28, 16:14	#138
Jean Penné May 2004 FRANCE 580₁₀ Posts	New status ; Updated presieved files Hi, Riesel even n's : k = 9519 is up to n = 1138936, no prime, continuing... Riesel odd n's : k = 148323 is up to n = 1023383, no prime, continuing... These k's are stubborn, so, I will probably give up on them if no prime found at end of summer time... I updated to-day the presieved files on my site : http://jpenne.free.fr/ConjRus/ Active Riesel files are sieved up to 4187.03 billions. Active Sierpinski files are sieved up to 2007.69 billions. Regards, Jean

2008-09-09, 09:09	#140
kar_bon Mar 2006 Germany 3²×17×19 Posts	Status even Riesel: k=175567 to 763k, no prime k=239107 to 1.103M, no prime Liskovets, Riesel even n: 3 k's at 444k, no prime Liskovets, Riesel odd n: 6 k's at 443k, no prime continuing all. will give the Liskovets-k's a boost on my Quad the next days!

2008-09-10, 20:02	#141
Jean Penné May 2004 FRANCE 2²×5×29 Posts	New Status ; Updated presieved files Hi, Riesel even n's : k = 9519 is up to n = 1255696, no prime, continuing... Riesel odd n's : k = 148323 is up to n = 1134543, no prime, continuing... I updated to-day the presieved files on my site : http://jpenne.free.fr/ConjRus/ Active Riesel files are sieved up to 5644.99 billions. Active Sierpinski files are sieved up to 2903.66 billions. Regards, Jean

2008-06-28, 09:48	#135
gd_barnes May 2007 Kansas; USA 101×103 Posts	Riesel base 4 k=19464 complete to n=500K (n=1M base 2). No primes. This one promises to be a huge challenge to find a prime on. It is the only k-value remaining for this base that is a multiple of the base and it is extremely low-weight. k=19464/4=4866 had a prime at n=1 but unfortunately the prime for k=19464 at n=0 doesn't count. I'm now releasing this k and adding a 2nd core to my new Riesel base 256 effort. Gary

2008-07-04, 01:27	#136
gd_barnes May 2007 Kansas; USA 101·103 Posts	Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are at n=772K; no primes. Continuing to n=800K.

2008-07-10, 06:36	#137
gd_barnes May 2007 Kansas; USA 101·103 Posts	Sierp base 2 odd-n k=53133, 60357, 84363, and 85287 are complete to n=800K; no primes. I'm now unreserving these stubborn k's.

2008-11-04, 20:50	#142
Jean Penné May 2004 FRANCE 2²·5·29 Posts	New status ; Updated presieved files Hi, Riesel even n's : k = 9519 is up to n = 1397376, no prime, continuing... Riesel odd n's : k = 148323 is up to n = 1166271, no prime, continuing... I updated to-day (04/11/2008) the presieved files on my site : http://jpenne.free.fr/ConjRus/ Active Riesel files are sieved up to 7211.34 billions. Active Sierpinski files are sieved up to 4020.12 billions. Regards, Jean

2008-11-17, 10:50	#143
kar_bon Mar 2006 Germany 5533₈ Posts	another k less to prove the conjecture: Riesel odd n: 106377*2^475569-1 is prime all (now 5) odd k's reserved by me at n=490k!

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