It is not known if there are infinitely many Wilson primes. This question seems to be of such a character that if I should come to life any time after my death and some mathematician were to tell me that it had definitely been settled, I think I would immediately drop dead again.

[Wilson primes satisfy (

5, 13, and 563 are the only Wilson primes less than 5 x 10

Quoted in D MacHale,

JOC/EFR February 2006

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