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Revision History for A254039 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A254039 Primes p such that (p^3 + 2)/3, (p^5 + 2)/3 and (p^7 + 2)/3 are prime.
(history; published version)
#17 by Charles R Greathouse IV at Thu Sep 08 08:46:11 EDT 2022
PROG

(MAGMAMagma) [p: p in PrimesInInterval(3, 10000000) | IsPrime((p^3 + 2) div 3) and IsPrime((p^5 + 2) div 3) and IsPrime((p^7 + 2) div 3)]; // Vincenzo Librandi, Mar 27 2015

Discussion
Thu Sep 08 08:46
OEIS Server: https://oeis.org/edit/global/2944
#16 by N. J. A. Sloane at Wed Apr 01 02:50:58 EDT 2015
STATUS

proposed

approved

#15 by K. D. Bajpai at Sat Mar 28 13:47:45 EDT 2015
STATUS

editing

proposed

#14 by Vincenzo Librandi at Fri Mar 27 04:57:43 EDT 2015
PROG

(MAGMA) [p: p in PrimesInInterval(3, 10000000) | IsPrime((p^3 + 2) div 3) and IsPrime((p^5 + 2) div 3) and IsPrime((p^7 + 2) div 3)]; // Vincenzo Librandi, Mar 27 2015

STATUS

proposed

editing

#13 by Jon E. Schoenfield at Thu Mar 26 22:47:03 EDT 2015
STATUS

editing

proposed

#12 by Jon E. Schoenfield at Thu Mar 26 22:46:59 EDT 2015
EXAMPLE

Allall four are prime.

STATUS

reviewed

editing

#11 by Tom Edgar at Thu Mar 26 21:36:10 EDT 2015
STATUS

proposed

reviewed

#10 by Michel Marcus at Sat Jan 31 02:51:07 EST 2015
STATUS

editing

proposed

Discussion
Sat Jan 31 02:56
K. D. Bajpai: May please see, I have already modified that as 1 mod 9.
#9 by Michel Marcus at Sat Jan 31 02:50:03 EST 2015
PROG

(PARI) is(n)=n%9==1 && isprime(n) && isprime((n^3+2)/3) && isprime((n^5+2)/3) && isprime((n^7+2)/3)) \\ _Charles R Greathouse IV_, Jan 23 2015

&& isprime((n^5+2)/3) && isprime((n^7+2)/3) \\ Charles R Greathouse IV, Jan 23 2015

STATUS

proposed

editing

#8 by K. D. Bajpai at Fri Jan 23 15:50:04 EST 2015
STATUS

editing

proposed

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Last modified August 30 00:57 EDT 2024. Contains 375520 sequences. (Running on oeis4.)