This number is a prime.
Single Curio View: (Seek other curios for this number)61 is the 7th prime of the form 3k+1 and 61 = (77+777)/(7+7). Note that seven 7's are used. [Firoozbakht]
Submitted: 2004-07-22 00:21:29; Last Modified: 2009-10-11 10:49:01.
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