Riesel Primes k*2^n-1, k<300 [Was "k=1"] - Page 36

Kosmaj · 2006-03-04, 14:58

I'd like to reserve k=277. I'll sieve from n=100k to fill the gaps on Keller's list.

There are only two k<300 without 10,000+ digit primes and one of them is k=277. The largest known prime is 277*2^17357-1 (5228 digits). The other one is k=253, n_max=27623, checked by Joss to 1166k.

Flatlander · 2006-03-04, 19:07

125*2^418034-1 is prime.

I hope.

Flatlander · 2006-03-04, 19:59

Quote:

Originally Posted by Flatlander

125*2^418034-1 is prime.

I hope.

Yes, it is.

Also reserving k=135 from 210,000 please.

Templus · 2006-03-04, 22:04

Finally, a new prime for me!

199*2^263051-1 is prime!

Templus · 2006-03-05, 10:38

And suddenly , out of nowhere:

93*2^362268-1 is prime!

109056 digits!

grobie · 2006-03-05, 14:31

nice one

Kosmaj · 2006-03-05, 18:48

Templus, congrats on your first prime with more than 100,000 digits

The status page has been updated with new primes, and new reservations. I also cancelled reservations by Joss and Jeffrey since I heard nothing from them in more than a year (they are listed at the bottom of the page). I also cancelled all reservations by "Prime Search" project in the k=250-300 range since according to their home page nobody is working on them beyond 260k (with exception of k=253 which they have reserved to 420k, but Joss already checked it to 1166k).

Kosmaj · 2006-03-05, 18:54

To Keller and Chaos:

You reserved several k's as follows:
Keller: 99, 237, 241
Chaos: 81, 127

but I haven't heard from you in a long while. Are you still working on these numbers? Please note that if you don't respond by March 31 (2006) I'll cancel your reservations. Thanks.

Kosmaj · 2006-03-05, 19:07

Keller promptly replied to my PM and informed me that he would like to release all his reserved k's. Therefore k=99, 237 and 241 are now available for tests. I'll mark them free in the next update of the status page.

grobie · 2006-03-06, 00:18

k=139 tested to 400k complete with 2 primes already reported. Will continue this k when I complete re-test.

lsoule · 2006-03-06, 17:09

Just a status update

k=69 tested up to 640k
k=195 tested up to 400k
k=223 tested up to 770k
k=231 tested up to 790k

I'm still running these 4.

2006-03-04, 14:58	#386
Kosmaj Nov 2003 2×1,811 Posts	k=277 I'd like to reserve k=277. I'll sieve from n=100k to fill the gaps on Keller's list. There are only two k<300 without 10,000+ digit primes and one of them is k=277. The largest known prime is 277*2^17357-1 (5228 digits). The other one is k=253, n_max=27623, checked by Joss to 1166k.

2006-03-04, 22:04	#389
Templus Jun 2004 152₈ Posts	finally! Finally, a new prime for me! 199*2^263051-1 is prime!

2006-03-06, 00:18	#395
grobie Sep 2005 Raleigh, North Carolina 337 Posts	k=139 k=139 tested to 400k complete with 2 primes already reported. Will continue this k when I complete re-test.

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2006-03-04, 19:07	#387
Flatlander I quite division it "Chris" Feb 2005 England 4035₈ Posts	125*2^418034-1 is prime. I hope.

2006-03-05, 10:38	#390
Templus Jun 2004 2×53 Posts	And suddenly , out of nowhere: 93*2^362268-1 is prime! 109056 digits!

2006-03-05, 14:31	#391
grobie Sep 2005 Raleigh, North Carolina 337 Posts	nice one

2006-03-05, 18:48	#392
Kosmaj Nov 2003 2×1,811 Posts	Templus, congrats on your first prime with more than 100,000 digits The status page has been updated with new primes, and new reservations. I also cancelled reservations by Joss and Jeffrey since I heard nothing from them in more than a year (they are listed at the bottom of the page). I also cancelled all reservations by "Prime Search" project in the k=250-300 range since according to their home page nobody is working on them beyond 260k (with exception of k=253 which they have reserved to 420k, but Joss already checked it to 1166k).

2006-03-05, 18:54	#393
Kosmaj Nov 2003 2·1,811 Posts	To Keller and Chaos: You reserved several k's as follows: Keller: 99, 237, 241 Chaos: 81, 127 but I haven't heard from you in a long while. Are you still working on these numbers? Please note that if you don't respond by March 31 (2006) I'll cancel your reservations. Thanks.

2006-03-05, 19:07	#394
Kosmaj Nov 2003 3622₁₀ Posts	Keller promptly replied to my PM and informed me that he would like to release all his reserved k's. Therefore k=99, 237 and 241 are now available for tests. I'll mark them free in the next update of the status page.

2006-03-06, 17:09	#396
lsoule Nov 2004 California 2³×3×71 Posts	Just a status update k=69 tested up to 640k k=195 tested up to 400k k=223 tested up to 770k k=231 tested up to 790k I'm still running these 4.