Intended for: September 9, 2012
Timetable
- First draft entered by Alonso del Arte on May 31, 2011 (as a verbatim copy of a write-up from December 9, 2010) ✓
- Draft reviewed by Alonso del Arte on September 3, 2011 ✓
- Draft approved by Daniel Forgues on September 8, 2012 ✓
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A134996: Dihedral calculator primes:
,
upside-down,
in-a-mirror,
upside-down-and-in-a-mirror are all primes.
...
The prime upside-down and/or in-a-mirror may be a different prime, as in the case of
2 or
5 upside-down or in-a-mirror (upside-down-and-in-a-mirror gives back
2 or
5, respectively); or the same prime, as in the case of
11 whether upside-down, in-a-mirror or upside-down-and-in-a-mirror. The digits of
are restricted to
0, 1, 2, 5, 8.
