2801
This number is a prime.
The largest minimal prime in base 7. [Rupinski]
The smallest prime equal to the sum of the n first powers
of 7 (n=5). [Loungrides]
The sum total of kitts, cats, sacks, wives, plus the man himself, in the St. Ives Problem.
2801, 28001, 280001 and 2800001 are all Pythagorean primes. [Anitha]
(There are 2 curios for this number that have not yet been approved by an editor.)
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