Fwd: New Prime Curio about 15999 by Post

[Jonathan Post]

Dear Maximilian Hasler,

I very much like your seq and code A131867 2^n-th semiprime.

Best,

Jonathan Vos Post

---------- Forwarded message ----------
From: jonathan post <jvospost2 at yahoo.com>
Date: Oct 7, 2007 11:15 AM
Subject: New Prime Curio about 15999 by Post
To: jvospost2 at yahoo.com, jvospost3 at gmail.com

To: editor
Subject: New Prime Curio about 15999 by Post
From: Prime Curios! automailer for
<jvospost2 at yahoo.com>

There has been a new curio submitted for your
approval:

15999 [number_id=7292]

4 and 6 are the first two semiprimes.
Curiously, 15999 = 3 * 5333 is the (4^6)-th semiprime,
equivalently the (2^12)-th semiprime, is emirpimes,
since 99951 = 3 * 33317.

Reference:
A131867 2^n-th semiprime.
[Post]
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