VOOZH about

URL: https://oeis.org/history?seq=A056657

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

login

Showing entries 1-10 | older changes
Numbers k such that 60*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.
#37 by Sean A. Irvine at Wed Oct 22 04:31:08 EDT 2025
STATUS
#36 by Michel Marcus at Wed Oct 22 02:13:24 EDT 2025
STATUS
#35 by Michel Marcus at Wed Oct 22 02:13:18 EDT 2025
KEYWORD
STATUS
#34 by Jason Yuen at Tue Oct 21 20:16:49 EDT 2025
STATUS
#33 by Jason Yuen at Tue Oct 21 20:16:31 EDT 2025
KEYWORD
EXTENSIONS
STATUS
#32 by Hugo Pfoertner at Sun Jul 07 17:08:39 EDT 2024
STATUS
#31 by Stefano Spezia at Sun Jul 07 16:21:30 EDT 2024
STATUS
#30 by Robert Price at Sun Jul 07 15:59:07 EDT 2024
STATUS
#29 by Robert Price at Sun Jul 07 15:58:31 EDT 2024
DATA
EXTENSIONS
STATUS
#28 by Susanna Cuyler at Sun Jul 04 22:08:02 EDT 2021
STATUS