Prime Curios!: 32099

32099
(another Prime Pages' Curiosity)

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32099 = 1^sigma(1) + 2^sigma(2)+ 3^sigma(3) + 4^sigma(4) + 5^sigma(5). It is the only known such number and next such prime (if it exists) has more than 20000 digits. [Firoozbakht]

Submitted: 2009-04-13 09:40:57; Last Modified: 2009-04-18 21:31:01.