Another two for Riesel base 31:

98964*31^12728-1
74660*31^13770-1

are both prime

That leaves 19 k's (now at 15.2k)

Another six for Sierpinski base 24:

19034*24^12797+1
15761*24^12824+1
4066*24^13162+1
2631*24^13192+1
5981*24^13260+1
691*24^13296+1

are all prime.

That leave 184 k's to test

[quote=Anonymous;121786]I noticed a little error on the Riesel Base 16 reservations page: Though it seems fine to me in the actual page, the title is set to "Sierpinski conjecture base 16 reservations" rather than Riesel base 16 like it should be. :smile:[/quote]

Ah, thanks for pointing that out. It will be corrected shortly.

Multiple people searching same k works
 

Nice finds tnerual and michaf!

Tnerual, if you're searching many of the k's for Sierp base 16 upwards by n all at once, I have no problem with that. Let me know so we don't overlap efforts and so that I can get all k's test-ranges updated. If not...my apologies. It just appears that way with several primes on k's barely above prior testing limits of n=25K.

In case people don't know, I have the web pages set up to allow for multiple people searching the same k, which is why I ask people for a limit that they are searching to. For instance here, if tnerual wants to reseve all or many of the Sierp base 16 k's up to n=30K/35K/whatever and he has the resources, I can show them all as such up until we start the team drive. Others would still be free to search the same k's above the limit that he is testing. I would just show 2 (or more) people reserving the k with the ranges of n that each are reserving. I even encourage such a colabrative effort, which is essentially what a team drive does.

I want to make this a more flexible effort than most. Any and all new ideas are welcome. If people want to reserve specific small ranges of n on many k-values, that works.

The only thing that I ask is that people don't reserve more than they can do in a reasonable time frame. Of course 'reasonable' is open to interpretation, but I think everyone gets the drift.


Thanks,
Gary

i will reserve all untested base 16 sierpinski from n=25k to n=30k
i will also reserve base 16 sierpinski k=35320 to n=100k

Gary, can you provide us with the full "bigsieve file" ?

as soon as i finish the ranges i will send you the residues.

Laurent

[quote=tnerual;121808]i will reserve all untested base 16 sierpinski from n=25k to n=30k
i will also reserve base 16 sierpinski k=35320 to n=100k

Gary, can you provide us with the full "bigsieve file" ?

as soon as i finish the ranges i will send you the residues.

Laurent[/quote]


Thanks for the update. Yes, I can do that. The files are all in links by k on the Sierp base 16 reservation web page but sending them to you would certainly make it easier for you. I'll just send you the range of n=25K-30K for now. If you finish that range and want to test more, let me know, and I'll send you some more.

Just to let everyone know, I'll show Laurent as having reserved all of the Sierp base 16 k's up to n=30K (except k=35320 that he is taking to n=100K) so it will 'appear' that they are fully reserved. But anyone is still welcome to reserve any of them for n>=30K. Obviously in a situation where 2 people are searching the same k, if one finds a prime, the other can stop searching it at his discretion.

This becomes the start of a 'quasi' team effort at this point. When it becomes 'official' after we're done fully sieving them, I'll post multiple files with small ranges of n for all k's in each file in a separate thread called 'team drive #1' or something similar.


Gary

[quote=tnerual;121808]i will reserve all untested base 16 sierpinski from n=25k to n=30k
i will also reserve base 16 sierpinski k=35320 to n=100k

Gary, can you provide us with the full "bigsieve file" ?

as soon as i finish the ranges i will send you the residues.

Laurent[/quote]


Laurent,

Attached is the 'big sieved file' for all 51 remaining k's minus 2 k's that are reserved by others for the range of n=25K-30K. I included your k=35320 in it. If you've already tested it higher than n=30K, you can use srfile to delete it from the file.

Good luck!


Gary

Riesel base 28:
8469*28^5421-1 is prime.
-Curtis

Riesel 28:
8469 yielded a prime in less than 20 min of work (5421, shown on primes thread).

Reserving 6207 and 7367, to 25k.
-Curtis

sierpinski base 28

1797*28^5681+1 is a probable prime. Time: 14.513 sec.

38562*16^26408+1 is prime! Time : 163.0 sec.

first prime of the 2008 year !