Sierp base 16 - team drive #1

[gd_barnes]

We are starting Conjectures 'R Us (CRUS) team drive #1 for Sierpinski base 16 starting at n=30K and continuing until all k's have a prime. Included in the drive are 15 of the remaining 18 k's that need a prime. A link to a sieved file is below. As we find primes, we will remove candidates from the files.

The file has been sieved for n=250K-500K and no more sieving is needed. The sieve depth is P=70T. As we find primes, we'll remove k's from the file for higher n-ranges.

We are posting one large file that people can cut individual reservations out of. This should give people more flexibility with their ranges. Please reserve a range that will take no longer than ~4-6 weeks. IMPORTANT: Please reserve in multiples of n=2000 and begin your range with n=xxx001 and end with n=xxx000 to avoid missing or duplicating tests.

Please post all primes, reservations, and statuses in this thread instead of using other multiple threads. We'll be checking this thread frequently for primes so that we can quickly get candidates removed from the file that no longer need to be tested.

Here is a breakdown of the 18 k's that are remaining:
15 in the team drive for n=200K-500K
1 reserved for base 4 and searched to n>500K
2 reserved for PrimeGrid and searched to n>1M with the Seventeen-or-Bust effort

Below are primes found from the team drive plus all individual efforts for Sierp base 16 for n > 25K. Red indicates top-5000 primes.

Prime found        by
18598*16^484327+1 Lennart
31347*16^411467+1 Lennart
65623*16^397735+1 Lennart
35320*16^360478+1 KEP
48697*16^350218+1 KEP
47395*16^340281+1 KEP
16015*16^239758+1 Mini-Geek
23682*16^232372+1 Mini-Geek
63853*16^195610+1 Mini-Geek
47482*16^138980+1 gd_barnes
58855*16^138074+1 gd_barnes
66505*16^134956+1 gd_barnes
32350*16^128411+1 gd_barnes
19725*16^126275+1 gd_barnes
63405*16^123035+1 mdettweiler
16390*16^102651+1 gd_barnes
13438*16^98815+1  tcadigan
44490*16^97806+1  em99010pepe
34543*16^91225+1  tnerual
39337*16^81875+1  tnerual
50863*16^77567+1  kar_bon
43468*16^75159+1  tnerual
52072*16^64816+1  tnerual
4885*16^60847+1   mdettweiler
21720*16^58990+1  kar_bon
19465*16^51462+1  kar_bon
49860*16^50809+1  kar_bon
7773*16^49946+1   tcadigan
12243*16^49693+1  tcadigan
62802*16^42004+1  geoff
58582*16^40601+1  geoff
17970*16^39540+1  tnerual
14910*16^37966+1  tcadigan
64518*16^36998+1  gd_barnes
10947*16^35687+1  tcadigan
19687*16^32360+1  kar_bon
29445*16^30066+1  kar_bon
59890*16^29827+1  tnerual
38562*16^26408+1  tnerual
24262*16^26165+1  tnerual
19122*16^25621+1  tnerual
32673*16^25481+1  tnerual

Status:

390K-500K    Lennart/KEP    complete       3
310K-390K    KEP            complete       3
260K-310K    MyDogBuster    complete       0
220K-260K    Mini-Geek      complete       2
210K-220K    MyDogBuster    complete       0
192K-210K    Mini-Geek      complete       1
172K-192K    MyDogBuster    complete       0
170K-172K    Flatlander     complete       0
166K-170K    Mini-Geek      complete       0
150K-166K    MyDogBuster    complete       0
146K-150K    gd_barnes      complete       0
140K-146K    mdettweiler    complete       0
124K-140K    gd_barnes      complete       5
122K-124K    mdettweiler    complete       1
120K-122K    gd_barnes      complete       0
104K-120K    LLRnet         complete       0
100K-104K    gd_barnes      complete       1
98K-100K     tnerual        complete       0 (1 other)
93.5K-98K    em99010pepe    complete       1
89K-93.5K    kar_bon        complete       0 (1 other)
86K-89K      tnerual        complete       0
83K-86K      kar_bon        complete       0
80K-83K      tnerual        complete       1
76K-80K      kar_bon        complete       1
72K-76K      tnerual        complete       1
68K-72K      kar_bon        complete       0
64K-68K      tnerual        complete       1
62K-64K      kar_bon        complete       0
60K-62K      tnerual        complete       0 (1 other)
56K-60K      kar_bon        complete       1
53K-56K      tnerual        complete       0
50K-53K      kar_bon        complete       2
47K-50K      tcadigan       complete       0 (2 other)
44K-47K      kar_bon        complete       0
40K-44K      geoff          complete       2
35K-40K      tnerual        complete       1 (plus 3 other)
30K-35K      kar_bon        complete       2
25K-30K      tnerual        complete       5

All sieved files have been tested. Eventually we will begin sieving a higher n-range.

All primes now found will be top-5000 primes so have fun and take down some k's!


Gary

[kar_bon]

so i try the first range: 30k to 35k for me

[tnerual]

35-40k for me

[geoff]

I'll take 40k-44k.

[tnerual]

as i started the team drive a little in advance (range 25k-30k) here is the result file

[gd_barnes]

Originally Posted by geoff

I'll take 40k-44k.

Welcome to the effort Geoff!

Originally Posted by tnerual

as i started the team drive a little in advance (range 25k-30k) here is the result file

Thanks for sending tnerual.


It looks like we're off to a quick start here! I'm currently sieving Riesel base 16 up to P=600G (currently at P=420G) and we'll start a 2nd team drive for that one sometime around Monday or Tuesday.


Gary

[kar_bon]

29445*16^30066+1 is prime (36208 digits)

[gd_barnes]

Originally Posted by kar_bon

29445*16^30066+1 is prime (36208 digits)

Excellent...very quick first prime!

I have removed k=29445 from all of the files for LLRing.

For those of you who have already reserved ranges, you can use srfile to remove k=29445 from your file if you want. The candidates were only about 4% of the files so not much additional testing at this low n-range. Alternatively, I decided to add back links to files already reserved that have k=29445 removed. You could use those.

One hint because I got burned on this one time. If you remove candidates from your file, be sure and change the line # that LLR restarts at or else you'll miss testing candidates. At this low n-range, it may not be worth the hassle.


Gary

[kar_bon]

so the first range is complete and next prime:
29445*16^30066+1 (reported yet)
19687*16^32360+1 (38970 digits) also prime.

taking 44k-47k

[mdettweiler]

Taking 47K-50K.

[gd_barnes]

Originally Posted by kar_bon

so the first range is complete and next prime:
29445*16^30066+1 (reported yet)
19687*16^32360+1 (38970 digits) also prime.

taking 44k-47k

Fast machine Karsten! I got 38-45 secs. testing time (vs. your 25-30 secs.) in that range when I LLR'd k=64518. The high k-value shouldn't have made any difference because LLR treats it like k=32259 since it's a multiple of 2, which is around the avg. sized k for this effort.

Originally Posted by Anonymous

Taking 47K-50K.

Anon and Karsten, if you think it's worth your trouble, you can use srfile to remove k=19687 from your files before testing. I'll remove it from the remaining file links here shortly.

Now that we've reserved up to 50K with people knocking these out so fast, everyone can feel free to take as many files as their resources reasonably allow.

At this rate, we may have many of the files reserved on this effort before we start the Riesel Base 16 team effort early next week!


Gary