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-   -   A Sierpinski/Riesel-like problem (https://www.mersenneforum.org/showthread.php?t=21839)

sweety439 2017-04-25 18:29

I reserved S3 to n=10K and found these two (probable) primes:

(823*3^6087+1)/2
(2747*3^7097+1)/2

all other k's <= 3047 were tested to n=10K with no (probable) prime found. (for the k's, see [URL="http://mersenneforum.org/showpost.php?p=457339&postcount=186"]post 186[/URL])

I will also reserve the k's >= 3061 to n=10K.

sweety439 2017-04-27 15:03

S3 tested to n=10K.

5 (probable) primes found, 22 remain.

(probable) primes:

(823*3^6087+1)/2
(2747*3^7097+1)/2
(10207*3^6089+1)/2
(10243*3^9731+1)/2
(10741*3^6028+1)/2

The remain k's are 621, 1187, 1801, 3007, 3047, 3061, 3307, 5321, 5743, 5893, 6427, 6569, 6575, 7927, 8161, 8227, 8467, 8609, 8863, 8987, 9263, 9449.

sweety439 2017-04-27 15:05

Reserve SR42 and SR60 to n=1000 (only test the k's not in CRUS).

sweety439 2017-04-27 15:19

1 Attachment(s)
Update a newer word file to include recent status for S3, S10, S31, R7 and R31.

sweety439 2017-04-27 15:41

S6, k=1814 at n=12K (equivalent to S36, k=1814 at n=6K), no (probable) prime found.

sweety439 2017-05-01 18:31

(189*31^5570+1)/10 is (probable) prime!!!

S31 has now 10 k's remain.

The remain k's for S31 are [FONT=&quot]1, 43, 51, 73, 77, 107, 117, 149, 181, 209.[/FONT]

The remain k's for R31 are [FONT=&quot]5, 19, 51, 73, 97.[/FONT]

SR31 are likely tested to [I]at least[/I] n=6K.

sweety439 2017-05-01 18:32

R43 tested to n=5K, no (probable) prime found.

sweety439 2017-05-02 17:15

(319*33^5043+1)/32 is (probable) prime!!!

S33 has now 3 k's remain.

The remain k's for S33 are [FONT=&quot]67, 203, 407.[/FONT]

The remain k's for R33 are 257, 339.

SR33 are likely tested to [I]at least[/I] n=6K.

sweety439 2017-05-02 17:16

R30, k=1654 tested to n=6K, no (probable) prime found.

kar_bon 2017-05-04 07:52

(1654*30^38869-1)/29 is 3-PRP!
(1654*30^38869-1)/29 is Lucas PRP!

A few hours work done and tested with pfgw64.

How about a page of your results instead of doc's or txt-files without any explanation in it?

sweety439 2017-05-05 12:39

4 Attachment(s)
SR42 and SR60 were tested to n=1000, only tested the k's not already in CRUS.


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