Bases 251-500 reservations/statuses/primes - Page 2

grobie · 2008-04-18, 17:26

reserving the following 7 Riesel Base 256 k's:
1695
2237
2715
2759
3039
3147
3155

I am not sure how far I will take them, but no more than 50k might be less, I am going to orientation for a new job soon out of town, so I don't want to commit to anything big.

grobie · 2008-04-20, 04:42

3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.

gd_barnes · 2008-04-20, 07:08

Quote:

Originally Posted by grobie

3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.

Nope, nothing more to do. Karsten should automatically list it on his 2000 < k < 4000 page when he gets it updated.

Nice work! It's good to knock out some of the base 256 k's. There's a very large # of k's remaining for such a high base.

Gary

grobie · 2008-04-30, 02:56

Quote:

Originally Posted by grobie

3155*256^27010-1 is prime
3155*2^216080-1 is prime!

Let me know if I need to do anything else with this.

Here is another one for Riesel Base 256:
3039*2^281056-1 is prime!

grobie · 2008-05-29, 02:00

Quote:

Originally Posted by grobie

reserving the following 7 Riesel Base 256 k's:
1695
2237
2715
2759
3039
3147
3155

All k's completed to 50k 2 primes already reported, no additional primes.

gd_barnes · 2008-06-27, 20:22

I'm reserving all remaining unreserved Riesel base 256 k-values (41 total k's). I'll take them from n=25K-75K (n=200K-600K base 2). This will be a double-check for the lower ranges on some of them.

Sieving has complete to P=1T, which is sufficient up to n=50K. Starting at only n=25K, I will initially will have only one high-speed core on it but will work up to having a full quad on it.

My goal is to have all powers-of-2 bases k-values up to n=600K base 2 by the end of Sept. Riesel and Sierp base 16 are close (n=560K base 2) and there are several even-n and odd-n conjectures k-values that are near n=400K that need to be pushed a little to accomplish this.

Edit: Although I am double-checking several k's that are already searched past n=75K, I won't show them as reserved since technically I'm not searching any new range on them. Anyone is free to reserve any k-value and test it above n=75K.

Gary

gd_barnes · 2008-06-29, 19:09

5139*256^30740-1 is prime

gd_barnes · 2008-07-02, 08:43

2 primes from Riesel base 256:

5027*256^28873-1 is prime
4137*256^29273-1 is prime

44 k's to go and testing is complete to n=32.8K on two cores.

Gary

gd_barnes · 2008-07-04, 01:23

Riesel base 256 at n=33.5K; one prime reported for n=30K-35K; continuing.

gd_barnes · 2008-07-08, 20:49

3855*256^36666-1 is prime

Riesel base 256 currently at n=37K with 43 k's remaining.

gd_barnes · 2008-07-10, 00:01

5247*256^36991-1 is prime

42 k's now remaining.

2008-04-18, 17:26	#12
grobie Sep 2005 Raleigh, North Carolina 337 Posts	reserving the following 7 Riesel Base 256 k's: 1695 2237 2715 2759 3039 3147 3155 I am not sure how far I will take them, but no more than 50k might be less, I am going to orientation for a new job soon out of town, so I don't want to commit to anything big. Last fiddled with by grobie on 2008-04-18 at 18:23 Reason: Added k=1695

2008-06-27, 20:22	#17
gd_barnes May 2007 Kansas; USA 3×5×727 Posts	I'm reserving all remaining unreserved Riesel base 256 k-values (41 total k's). I'll take them from n=25K-75K (n=200K-600K base 2). This will be a double-check for the lower ranges on some of them. Sieving has complete to P=1T, which is sufficient up to n=50K. Starting at only n=25K, I will initially will have only one high-speed core on it but will work up to having a full quad on it. My goal is to have all powers-of-2 bases k-values up to n=600K base 2 by the end of Sept. Riesel and Sierp base 16 are close (n=560K base 2) and there are several even-n and odd-n conjectures k-values that are near n=400K that need to be pushed a little to accomplish this. Edit: Although I am double-checking several k's that are already searched past n=75K, I won't show them as reserved since technically I'm not searching any new range on them. Anyone is free to reserve any k-value and test it above n=75K. Gary Last fiddled with by gd_barnes on 2008-06-27 at 20:27

2008-07-04, 01:23	#20
gd_barnes May 2007 Kansas; USA 25231₈ Posts	Riesel base 256 at n=33.5K; one prime reported for n=30K-35K; continuing. Last fiddled with by gd_barnes on 2010-04-01 at 22:43 Reason: remove base <= 250

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bases 501-1030 reservations/statuses/primes	KEP	Conjectures 'R Us	4098	2022-07-01 18:08
Bases 101-250 reservations/statuses/primes	gd_barnes	Conjectures 'R Us	989	2022-06-26 08:35
Riesel base 3 reservations/statuses/primes	KEP	Conjectures 'R Us	1134	2022-06-24 20:28
Bases 33-100 reservations/statuses/primes	Siemelink	Conjectures 'R Us	1724	2022-06-04 06:20
Bases 6-32 reservations/statuses/primes	gd_barnes	Conjectures 'R Us	1417	2022-05-25 19:33

2008-04-20, 04:42	#13
grobie Sep 2005 Raleigh, North Carolina 337 Posts	3155256^27010-1 is prime 31552^216080-1 is prime! Let me know if I need to do anything else with this.

2008-06-29, 19:09	#18
gd_barnes May 2007 Kansas; USA 25231₈ Posts	5139*256^30740-1 is prime

2008-07-02, 08:43	#19
gd_barnes May 2007 Kansas; USA 10905₁₀ Posts	2 primes from Riesel base 256: 5027256^28873-1 is prime 4137256^29273-1 is prime 44 k's to go and testing is complete to n=32.8K on two cores. Gary

2008-07-08, 20:49	#21
gd_barnes May 2007 Kansas; USA 2A99₁₆ Posts	3855*256^36666-1 is prime Riesel base 256 currently at n=37K with 43 k's remaining.

2008-07-10, 00:01	#22
gd_barnes May 2007 Kansas; USA 10905₁₀ Posts	5247*256^36991-1 is prime 42 k's now remaining.