25792148743

This number is a prime.

                                                                2 5792148743

+ 25792148743 = prime(prime(prime(2*5*7*9*2*1*4*8*7*4*3))). The prime 25792148743 is the largest known number (up to 1.3*10^11) with this property. [Firoozbakht]

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