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2023-06-08, 21:13
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#100 |
"Vincent"
Apr 2010
Over the rainbow
23×5×73 Posts |
b263+ taken to 100k, no prime,
taking b265+, b267+ and b269+ |
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2023-06-13, 12:15
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#101 |
"Mark"
Apr 2003
Between here and the
734110 Posts |
Cullen bases 70, 71, 72, 74, 75, 76, 77, and 78 completed to n=200000 and released.
132339*72^132339+1 is the only new prime. |
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2023-06-16, 15:51
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#102 |
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Jun 2023
22 Posts |
Hi. I am new here and would like to participate. With my limited computing power, I would like to contribute and search on Woodall bases with no primes yet. I would like to reserve Woodall bases 313 and 314.
To familiarize with the flow, I tested on some smaller b and n values and compare with known results. In the process, I stumbled upon a relatively tiny unlisted prime: 4910*83^4910-1 |
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2023-06-16, 16:51
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#103 | |
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"Mark"
Apr 2003
Between here and the
3×2,447 Posts |
Quote:
Per Steven Harvey's website I had originally tested to n=4000, but I see no record of it being tested between n=4000 and n=26000. In fact, most Woodall bases seem to have big gaps. I recommend that you work on filling in those gaps or double-checking bases < 100 to n=100000 or higher. |
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2023-06-17, 05:31
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#104 | |
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Jun 2023
22 Posts |
Quote:
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2023-06-17, 18:53
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#105 | |
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"Vincent"
Apr 2010
Over the rainbow
23×5×73 Posts |
b265+, b267+ and b269+ taken to 100e3, one prime found
Quote:
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2023-06-19, 12:44
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#106 |
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"Mark"
Apr 2003
Between here and the
3·2,447 Posts |
I will double-check Woodall bases from 90 to 100 to n=1e5 since we know there are gaps in those bases. I'm already sieving the same bases for Cullen and since gcwsieve can handle both concurrently, it should save time with sieving.
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2023-06-25, 13:54
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#107 |
Jul 2003
27·5 Posts |
hi,
gwb=101, n=250k to 400k done no prp found continuing |
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2023-06-28, 18:38
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#108 | |
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"Mark"
Apr 2003
Between here and the
3×2,447 Posts |
Quote:
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2023-06-29, 00:28
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#109 |
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"Mark"
Apr 2003
Between here and the
3×2,447 Posts |
Cullen bases 80, 82, 83, 84, 85, 86, 88 are double-checked and complete to n=200000.
Woodall bases 82, 84, 85, 86, 88 are double-checked and complete to n=200000 with the exception of the ranges below n=26000 that are not complete per Steven Harvey's website. AFAICT all of the bases from 80 thru 89 have gaps below n=26000. These are the new primes: 167670*82^167670-1 177015*82^177015+1 128867*84^128867+1 198291*86^198291+1 Last fiddled with by rogue on 2023-06-29 at 00:28 |
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2023-07-02, 06:51
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#110 |
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"Vincent"
Apr 2010
Over the rainbow
23·5·73 Posts |
b271+,b272+,b275+,b277 checked upto 100k, no prime found
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