61

This number is a prime.

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The largest known prime of the form Ack(m, m), where Ack is the Ackermann function (which grows faster than an exponential function). Ack(3, 3) = 61. [Hartley]

Submitted: 2003-04-01 20:58:00;   Last Modified: 2009-01-22 20:18:11.
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