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#17 by Charles R Greathouse IV at Thu Sep 08 08:46:11 EDT 2022
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| PROG
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(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
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Discussion
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Thu Sep 08
| 08:46
| OEIS Server: https://oeis.org/edit/global/2944
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#16 by N. J. A. Sloane at Wed Apr 01 02:50:58 EDT 2015
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#15 by K. D. Bajpai at Sat Mar 28 13:47:45 EDT 2015
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#14 by Vincenzo Librandi at Fri Mar 27 04:57:43 EDT 2015
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| PROG
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(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
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| STATUS
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proposed
editing
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#13 by Jon E. Schoenfield at Thu Mar 26 22:47:03 EDT 2015
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#12 by Jon E. Schoenfield at Thu Mar 26 22:46:59 EDT 2015
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| EXAMPLE
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Allall four are prime.
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| STATUS
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reviewed
editing
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#11 by Tom Edgar at Thu Mar 26 21:36:10 EDT 2015
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#10 by Michel Marcus at Sat Jan 31 02:51:07 EST 2015
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Discussion
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Sat Jan 31
| 02:56
| K. D. Bajpai: May please see, I have already modified that as 1 mod 9.
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#9 by Michel Marcus at Sat Jan 31 02:50:03 EST 2015
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| PROG
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(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
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| STATUS
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proposed
editing
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#8 by K. D. Bajpai at Fri Jan 23 15:50:04 EST 2015
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