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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
Numbers k such that (17*10^k + 79)/3 is prime.
#22 by Alois P. Heinz at Sun May 26 14:58:41 EDT 2024
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#21 by Jon E. Schoenfield at Sun May 26 14:24:46 EDT 2024
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#20 by Jon E. Schoenfield at Sun May 26 14:23:54 EDT 2024
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LINKS
EXAMPLE
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#19 by Alois P. Heinz at Mon Jul 10 10:07:21 EDT 2023
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#18 by Alois P. Heinz at Mon Jul 10 10:07:18 EDT 2023
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#17 by Michel Marcus at Mon Jul 10 09:44:57 EDT 2023
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#16 by Robert Price at Mon Jul 10 09:43:06 EDT 2023
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#15 by Robert Price at Mon Jul 10 09:43:01 EDT 2023
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#14 by Alois P. Heinz at Mon Apr 15 16:26:38 EDT 2019
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#13 by Alois P. Heinz at Mon Apr 15 13:46:27 EDT 2019
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Discussion
Mon Apr 15
15:05
Felix Fröhlich: hard?