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Revision History for A283684

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A283684

Numbers k such that 3*10^k + 17 is prime.
(history; published version)

#15 by Alois P. Heinz at Sat May 25 19:09:19 EDT 2024

STATUS

reviewed

approved

#14 by Hugo Pfoertner at Sat May 25 17:34:06 EDT 2024

STATUS

proposed

reviewed

#13 by Jon E. Schoenfield at Sat May 25 17:25:33 EDT 2024

STATUS

editing

proposed

#12 by Jon E. Schoenfield at Sat May 25 17:25:25 EDT 2024

COMMENTS

For k > 1, numbers k such that the digit 3 followed by k-2 occurrences of the digit 0 followed by the digits 17 is prime (see Example section).

LINKS

Makoto Kamada, <a href="https://stdkmd.net/nrr/prime/primedifficultyprime_difficulty.txt">Search for 30w17.</a>.

EXAMPLE

Initial terms and primes associated primes:

STATUS

approved

editing

#11 by Charles R Greathouse IV at Thu Jan 17 13:44:09 EST 2019

LINKS

Makoto Kamada, <a href="httphttps://stdkmd.comnet/nrr">Factorization of near-repdigit-related numbers</a>.

Makoto Kamada, <a href="httphttps://stdkmd.comnet/nrr/prime/primedifficulty.txt">Search for 30w17.</a>

Discussion

Thu Jan 17

13:44

OEIS Server: https://oeis.org/edit/global/2791

#10 by N. J. A. Sloane at Sat Jul 28 00:55:00 EDT 2018

STATUS

reviewed

approved

#9 by Michel Marcus at Fri Jul 27 13:28:33 EDT 2018

STATUS

proposed

reviewed

#8 by Robert Price at Fri Jul 27 12:57:35 EDT 2018

STATUS

editing

proposed

#7 by Robert Price at Fri Jul 27 12:57:31 EDT 2018

DATA

1, 2, 5, 6, 13, 17, 24, 29, 38, 43, 59, 92, 350, 365, 679, 1016, 2958, 4434, 6306, 8819, 11687, 13484, 22189, 43034, 69354, 78146, 78631, 150182

COMMENTS

a(2829) > 2*10^5.

EXTENSIONS

a(28) from Robert Price, Jul 27 2018

STATUS

approved

editing

#6 by N. J. A. Sloane at Thu Mar 16 15:01:14 EDT 2017

STATUS

proposed

approved