The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A140775 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A140775

Numbers k > 1 such that p + k/p is prime for every prime p that divides k.
(history; published version)

#21 by Peter Luschny at Wed Mar 06 04:47:45 EST 2024

STATUS

reviewed

approved

#20 by Joerg Arndt at Wed Mar 06 01:57:28 EST 2024

STATUS

proposed

reviewed

#19 by Michel Marcus at Wed Mar 06 01:18:47 EST 2024

STATUS

editing

proposed

#18 by Michel Marcus at Wed Mar 06 01:18:44 EST 2024

MATHEMATICA

fQ[n_] := Block[{p = First@ Transpose@ FactorInteger@ n}, Union@ PrimeQ[p + n/p] == {True}]; Select[ Range[2, 1221], fQ@# &] - _(* _Robert G. Wilson v_, May 30 2008 *)

STATUS

approved

editing

#17 by Joerg Arndt at Thu Jan 11 03:35:14 EST 2024

STATUS

reviewed

approved

#16 by Michel Marcus at Thu Jan 11 00:59:29 EST 2024

STATUS

proposed

reviewed

#15 by Robert Israel at Wed Jan 10 09:43:32 EST 2024

STATUS

editing

proposed

#14 by Robert Israel at Wed Jan 10 09:43:25 EST 2024

NAME

Number Numbers k > 1 such that p + k/p is prime for every prime p that divides k.

STATUS

proposed

editing

#13 by Joerg Arndt at Wed Jan 10 00:25:38 EST 2024

STATUS

editing

proposed

#12 by Joerg Arndt at Wed Jan 10 00:25:31 EST 2024

NAME

A number Number k > 1 is included if such that p + k/p is prime for every prime p that divides k.

STATUS

proposed

editing