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Old 2020-04-25, 17:47   #353
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Quote:
Originally Posted by sweety439 View Post
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)
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)
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Old 2020-05-05, 01:10   #354
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...........
Attached Files
File Type: txt numbers k such that n followed by k 1s is prime.txt (64.0 KB, 42 views)
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Old 2020-05-29, 18:03   #355
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Update my program of unique primes.
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File Type: txt program of unique prime (better program).txt (200 Bytes, 37 views)
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Old 2020-05-29, 18:06   #356
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Quote:
Originally Posted by sweety439 View Post
Update my program of unique primes.
Fixed the program.
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File Type: txt program of unique prime (better program).txt (247 Bytes, 40 views)
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Old 2020-06-04, 00:52   #357
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See https://dozenal.fandom.com/wiki/Conj...numbers_base_n for the conjectured smallest Sierpinski/Riesel numbers for bases <= 1000, also see https://dozenal.fandom.com/wiki/Sier...s_sorted_by_CK for these conjectures sorted by conjectured k
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Old 2020-06-27, 07:09   #358
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Update my program.
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File Type: txt program of dozenal English name.txt (794 Bytes, 23 views)
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Old 2020-07-05, 14:36   #359
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Update files
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File Type: zip k = 2 to 12.zip (50.2 KB, 17 views)
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Old 2020-07-17, 09:05   #360
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.......
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File Type: txt Racaman sequence.txt (15.3 KB, 17 views)
File Type: txt inverse of Racaman sequence.txt (15.6 KB, 22 views)
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Old 2020-09-12, 14:45   #361
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Update programs for https://github.com/xayahrainie4793/all-k-1024 and https://github.com/xayahrainie4793/S...-variable-base
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File Type: txt program of Sierpinski.txt (380 Bytes, 9 views)
File Type: txt program of Riesel.txt (696 Bytes, 9 views)
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