8191

This number is a prime.

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3 special numbers, very close to each other, were the choices in "Guess the Attendance" contest of a baseball game in a 2006 episode of "The Simpsons".

A) 8128 (perfect number)
B) 8208 (narcissistic number)
C) 8191 (Mersenne prime)
D) No way to tell [Gudipati]

Submitted: 2026-04-09 16:20:26; Last Modified: 2026-04-18 15:34:42.