grobie
 

Thanks for the notice. I just changed the wording in post #1. Since I work on several [I]k[/I]'s all the time, I usually mail him my status once every 5-6 months. You can mail him before if you complete a certain range and don't plan to work on that [I]k[/I] any more.

I also added a link to a "hidden" page on Top-5000 to search for primes of form k*2^n+/-1.

I am releasing k=247. I have finished LLR up to and including n=1046253.

thanks,
Larry

k=93 completed until n=355000, no new primes

Also reserving k=107

5^3
 

125*2^388934-1 is prime.

322000 to 335000 not yet tested.

k=239
 

Reserving k=239 from n=230k

Summary
 

As I mentioned in the [URL="http://www.mersenneforum.org/showthread.php?p=74000#post74000"]Further Plans thread[/URL] we'd like to reserve the following 20k's for RPS in the n=210-600k range:
107, 115, 131, 133, 143, 145, 149, 167, 169, 175, 179, 181, 185, 187, 221, 227, 229, 233, 235, and 239.

Templus kindly agreed to release k=107 and is working on k=199 instead.
I also asked amphoria to replace k=239 by another k.

For people who would like to work on a single [I]k[/I] by themselves I can recommend k's in the k=197-217 range, all of them have been checked to n=250k. The following k's divisible by 3 are also available from n=210k:135, 141, 147, and 177. Nobody is working on them now.

We also have outstanding reservetions of k=99, 237 and 241 by Keller and of k=81 and 127 by Chaos. They made their reservations a long time ago but so far they never reported any progress. I'll see with them to release the k's they are not working on.

Finally, k=103 and k=173 have primes at 300k level so we are leaving them for the time being. Another [I]k[/I] with many primes reported by low completion range is k=17.

[QUOTE=amphoria]Reserving k=239 from n=230k[/QUOTE]

For the record I have released this k.

k=139
 

Just an update k=139 has been tested by me from n=210k currently at n=354727 with 1 prime in that range. Will continue to 400k

k=141, 147
 

It seems that k=141 and k=147 are still available for testing for n>210000.
So, I'll take them too and will carry them to n=500000.

I'll also do the verification for the range n=100000-200000, since due to Wilfrid Keller's list both k are tested only up to n=100000 (by David Broadhurst) and for Stephen Harvey's n=200000-210000 range.

k=191
 

k=191 has been tested to n=500000 (where I'm stopping), no primes found :no:

Congrats to Robert Smith on a nice prime :cool:

[B]15*2^902474-1[/B] (271673 digits)