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Old 2018-09-03, 06:31   #221
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Update pfgw file for negative bases
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File Type: log pfgw.log (276 Bytes, 57 views)
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Old 2020-04-13, 23:47   #222
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upload the current status, a(522) and a(684) given by https://oeis.org/A128164
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Old 2020-05-12, 12:11   #223
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I finished base -97 repunit search for exponents up to 500000, still no any PRP found.
Attached are residues of PRP test and factors found. Special thanks to Mr Danilo for his gr-mfaktc program(it's easy to modify it to factor generalized Wagstaff numbers).
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File Type: zip PRPbase-97.zip (3.67 MB, 12 views)

Last fiddled with by Fan Ming on 2020-05-12 at 12:23
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Old 2020-05-13, 10:18   #224
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Quote:
Originally Posted by Fan Ming View Post
I finished base -97 repunit search for exponents up to 500000, still no any PRP found.
Attached are residues of PRP test and factors found. Special thanks to Mr Danilo for his gr-mfaktc program(it's easy to modify it to factor generalized Wagstaff numbers).
Great!!! Can you also complete bases -103 and -113? Also bases 185, 269, and 281.
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Old 2020-05-13, 10:22   #225
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Quote:
Originally Posted by sweety439 View Post
Great!!! Can you also complete bases -103 and -113? Also bases 185, 269, and 281.
Test limits (by me):

b=185 at n=66337
b=269 at n=63659
b=281 at n=63421

b=-97 at n=59863
b=-103 at n=59509
b=-113 at n=59021
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Old 2020-05-26, 10:45   #226
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These numbers are (probable) primes (thanks to Michael Stocker!!!)

(485^99523-1)/484
(691^62903-1)/690
(649^43987-1)/648
(693^41189-1)/692
(752^32833-1)/751
(629^32233-1)/628
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Old 2020-05-26, 10:49   #227
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Quote:
Originally Posted by sweety439 View Post
These numbers are (probable) primes (thanks to Michael Stocker!!!)

(485^99523-1)/484
(691^62903-1)/690
(649^43987-1)/648
(693^41189-1)/692
(752^32833-1)/751
(629^32233-1)/628
Update newest text files, still 33 unknown terms.
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Old 2020-08-18, 01:46   #228
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(932^20431-1)/931 is (probable) prime (found by Batalov), see http://www.primenumbers.net/prptop/s...&action=Search

Fixed the text file, now 32 unknown terms at indices <= 1024:

{185, 269, 281, 380, 384, 385, 394, 396, 452, 465, 511, 574, 598, 601, 629, 631, 632, 636, 711, 713, 759, 771, 795, 861, 866, 881, 938, 948, 951, 956, 963, 1005, 1015}

Last fiddled with by sweety439 on 2020-08-18 at 17:23
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