10007
This number is a prime.
Just showing those entries submitted by 'Green': (Click here to show all)
The smallest prime with an odd number of digits
that is a member of a 'twimirp' (a twin prime pair whose
members are emirps). In this case the associated emirps are
70001 and 90001. Curiously, it is also the smallest prime with an odd number
of digits that is a member of 'twirp', (a emirp pair such
that each is a member of a twin prime pair). In this case,
the associated primes are 10009 and 70003. [Green]
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