mersenneforum.org Riesel Primes k*2^n-1, k<300 [Was "k=1"]
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 2005-12-11, 23:07 #353 Kosmaj     Nov 2003 2·1,811 Posts I'm also taking k=193. The stats page is updated.
 2005-12-21, 09:53 #354 Kosmaj     Nov 2003 70468 Posts 63*2^323432-1 is prime, 97365 digits. Current status (search started at n=200k) k=63 checked to n=323600, k=193 checked to n=375000.
 2005-12-21, 18:04 #355 lsoule     Nov 2004 California 110101010002 Posts Reserving 247 from n=400k Status of k=231: at n=713k and continuing
 2005-12-27, 03:18 #356 Kosmaj     Nov 2003 2×1,811 Posts A lucky weekend, three primes found, all three with more than 100k digits 193*2^439107-1 132187 digits 193*2^405483-1 122065 digits 63*2^340463-1 102492 digits
 2005-12-28, 10:35 #357 Templus     Jun 2004 2×53 Posts update on k=93 k=93 has been sieved until 440bn for 330000
 2005-12-30, 22:02 #358 Cruelty     May 2005 2·809 Posts k=25 no primes till n=500000 , I'll continue until I find one
 2006-01-24, 18:06 #359 lsoule     Nov 2004 California 23×3×71 Posts After a couple of big primes for my ks < 300, I thought I'd post a status update for all of them: 69: Complete through n=580k, prime at n=580596 231: Complete through n=750k, prime at n=749301 247: Complete through n=850k All 3 are continuing
 2006-01-26, 22:34 #360 lsoule     Nov 2004 California 23×3×71 Posts Reserving k=223 from n=210k
 2006-02-02, 13:41 #361 Thomas11     Feb 2003 77316 Posts This is just a status update: k=11: tested upto n=1.2M k=29: tested upto n=1.6M No new primes found, continuing both k.
 2006-02-02, 18:35 #362 Thomas11     Feb 2003 1,907 Posts I'll take k=191 a little bit further. The stats page reports that it is tested upto n=270000, so I'll start there. Please let me know, if someone else is already testing this k. -- Thomas11
 2006-02-04, 04:01 #363 Kosmaj     Nov 2003 E2616 Posts Thomas, thanks for your report, I updated the stats page, and reserved k=191 for you. I'm not aware that anybody else is working on it. BTW, I cancelled outstandig reservations by Jeffrey of k=9, 51, 59, and 117. It's possible that he checked these k's to a little bit higher limits than indicated but I have no means to find out. I think he stopped all his clients shortly after he found a prime for k=9 at n=828k.

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