Largest Known Prime Number discovered

[Thomas Okken]

That's pretty lame. Raising X to the 77232917th power, using repeated squaring, takes 39 multiplications: 26 squares and 13 multiplications by X. That shouldn't take hours, even with millions of digits.

EDIT: Mathematica gets the exact result in a few seconds (MacBook Air, 1.6 GHz i5). Alpha refuses to show me more than 1845 digits.