Prime Curios!: 11213

11213
(another Prime Pages' Curiosity)

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The Mathematics Department at the University of Illinois had their postage meter changed to stamp "2¹¹²¹³ - 1 IS PRIME" after a record-breaking Mersenne prime was found there in 1963.

To link to this page use http://primes.utm.edu/curios/page.php?number_id=146