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Revision History for A100599

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A100599

Numbers k such that (prime(k)-1)! + prime(k)^7 is prime.
(history; published version)

#22 by Joerg Arndt at Wed Jul 03 01:12:56 EDT 2024

STATUS

editing

approved

#21 by Joerg Arndt at Wed Jul 03 01:12:54 EDT 2024

FORMULA

Numbers k such that (prime(k)-1)! + prime(k)^7 is prime, where prime(k) is the k-th prime.

EXAMPLE

a(71) = 7 because (prime(7)-1)! + prime(7)^7 = (17-1)! + 17^7 = 20923200226673 is the smallest prime of that form.

STATUS

approved

editing

#20 by Joerg Arndt at Wed Jul 03 01:12:04 EDT 2024

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reviewed

approved

#19 by Michel Marcus at Wed Jul 03 00:18:32 EDT 2024

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proposed

reviewed

#18 by Michael S. Branicky at Tue Jul 02 22:04:48 EDT 2024

STATUS

editing

proposed

#17 by Michael S. Branicky at Tue Jul 02 22:04:45 EDT 2024

COMMENTS

a(5) > 2500. - Michael S. Branicky, Jul 02 2024

STATUS

approved

editing

#16 by Bruno Berselli at Fri Apr 10 11:36:54 EDT 2020

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reviewed

approved

#15 by Michel Marcus at Fri Apr 10 09:26:29 EDT 2020

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proposed

reviewed

#14 by Jinyuan Wang at Fri Apr 10 09:13:08 EDT 2020

STATUS

editing

proposed

#13 by Jinyuan Wang at Fri Apr 10 09:12:15 EDT 2020

LINKS

Jonathan Vos Post, <a href="http://magicdragon.com/math.html">Math Pages</a>.

STATUS

proposed

editing

Discussion

Fri Apr 10

09:13

Jinyuan Wang: ah... see A100605, I also think the link is not related...