Riesel base 60 is complete to n=10K. 3 primes found since n=8.5K. 81 k's remain. Details on the web pages. It is now unreserved.

Now reserving Sierp base 37 to n=25K. I'm currently at n=5K with 8 k's remaining.


Gary

[quote=gd_barnes;156038]Can you post a results file? Thanks.


Gary[/quote]
attached

Reserving Riesel Base 72

k=4 (last one) reserving from n=54K to n=200K

Riesel Base 45

5128*45^31528-1 is prime! (1471.1138s+0.0036s)

17 left

Riesel Base 37

Reserving all 27 k's from n=20K to n=70K

Just thinning out the ranks

Riesel base 75 tested to 10k. (No reservation.) No more testing.

17 ks remaining.

Riesel base 95 tested to 10k. (No reservation.) No more testing.

24 ks remaining.

I believe k=324 can be removed. Odd n has factors of 7,13,37 or 229 for as far as I could test.
I think other ks can remain but I was having problems with the factoring website.

The reason I am testing without making reservations is because it's difficult to tell which bases are hard until they are part tested. I regularly check this thread to make sure there is no repetition of work. :smile:

I am trying to push Riesel base 39 to at least n=1000.

Sierp base 33 complete to n=25K; 3 k's remaining

Sierp base 37 complete to n=25K; 4 k's remaining

See k's and primes on the web pages.

Both bases are now unreserved.

[quote=Flatlander;156769]Riesel base 95 tested to 10k. (No reservation.) No more testing.

24 ks remaining.

I believe k=324 can be removed. Odd n has factors of 7,13,37 or 229 for as far as I could test.
I think other ks can remain but I was having problems with the factoring website.

The reason I am testing without making reservations is because it's difficult to tell which bases are hard until they are part tested. I regularly check this thread to make sure there is no repetition of work.

I am trying to push Riesel base 39 to at least n=1000.[/quote]


Good analogy. That is correct that k=324 can be eliminated. The official covering set for odd-n is {7 13 229}. 37 is not needed.

This is a most unusual situation. So far, there is only one other Riesel k and base < 100 where algebraic factors on even-n combine with a covering set of MORE than one factor on odd-n to eliminate a k. That is 1369*30^n-1.


Gary

[quote=Flatlander;156769]
I am trying to push Riesel base 39 to at least n=1000.[/quote]
Also Riesel base 58. (Can't stand those gaps. lol)

Reserving Sierp. base 33 for sieving to n=100K. :smile:

I was thinking that this would be an interesting base to run through PRPnet--we'd probably have it done in a very short time, and with only 3 k's remaining, there is a very good chance of proving this base in a short amount of time. What does everyone think about this?

(Note: even if we don't do it through PRPnet, I still plan to complete the sieving, which I started earlier today and is proceeding to finish probably sometime today or tomorrow. :smile:)