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-   -   xddd (https://www.mersenneforum.org/showthread.php?t=22644)

 sweety439 2020-04-25 17:47

[QUOTE=sweety439;543791]Smallest odd prime p such that (a^p-b^p)/(a-b) is (probable) prime for 2<=a<=50, -a<b<a, gcd(a,b) = 1

There are only 5 unknown (a,b): (32, -5), (43, 7), (44, -43), (46, 31), (50, -37)[/QUOTE]

The top 12 PRPs are: (only sorted by exponent)

(48^58543-47^58543)/(48-47)
(50^56099+43^56099)/(50+43)
(46^45281+11^45281)/(46+11)
(49^38069-46^38069)/(49-46)
(47^32833-33^32833)/(47-33)
(18^25667-1^25667)/(18-1)
(49^16747+46^16747)/(49+46)
(38^16747+7^16747)/(38+7)
(37^13217-34^13217)/(37-34)
(47^9181+37^9181)/(47+37)
(31^6961-6^6961)/(31-6)
(47^5641-23^5641)/(47-23)

 sweety439 2020-05-05 01:10

1 Attachment(s)
...........

 sweety439 2020-05-29 18:03

1 Attachment(s)
Update my program of unique primes.

 sweety439 2020-05-29 18:06

1 Attachment(s)
[QUOTE=sweety439;546747]Update my program of unique primes.[/QUOTE]

Fixed the program.

 sweety439 2020-06-04 00:52

See [URL="https://dozenal.fandom.com/wiki/Conjectured_smallest_Sierpinski_and_Riesel_numbers_base_n"]https://dozenal.fandom.com/wiki/Conjectured_smallest_Sierpinski_and_Riesel_numbers_base_n[/URL] for the conjectured smallest Sierpinski/Riesel numbers for bases <= 1000, also see [URL="https://dozenal.fandom.com/wiki/Sierpinski_and_Riesel_conjectures_sorted_by_CK"]https://dozenal.fandom.com/wiki/Sierpinski_and_Riesel_conjectures_sorted_by_CK[/URL] for these conjectures sorted by conjectured k

 sweety439 2020-06-27 07:09

1 Attachment(s)
Update my program.

 sweety439 2020-07-05 14:36

1 Attachment(s)
Update files

 sweety439 2020-07-17 09:05

2 Attachment(s)
.......

 sweety439 2020-09-12 14:45

2 Attachment(s)
Update programs for [URL="https://github.com/xayahrainie4793/all-k-1024"]https://github.com/xayahrainie4793/all-k-1024[/URL] and [URL="https://github.com/xayahrainie4793/Sierpinski-Riesel-for-fixed-k-and-variable-base"]https://github.com/xayahrainie4793/Sierpinski-Riesel-for-fixed-k-and-variable-base[/URL]

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