1001 Arabian Nights
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1001 Arabian Nights
In HEX, 1101 1001 is D9. Translated to decimal, that equals 217.
Off the top of my head, 1001 is the answer. Check it out and see . . . _________ 1001 is not prime. 7 X 143 equals 1001. There is 11, which is prime and which has 2 digits.
n=1 is the the lowest level there is.
Sum of first n numbers = n/2(n +1) = 500 x 1001 = 500500