271
This number is a prime.
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The smaller of only two primes less than a googol formed by concatenating in descending order the cubes of first n odd numbers, (case n=2). The other prime is for n=14. [Loungrides]
The smallest number n such that 100!-n is prime. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
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