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Just showing those entries submitted by 'Hasler': (Click here to show all)

+ The 66-digit number 6*(10^66-1)/9+1, successor of the number having 66 digits "6", is prime. It is the 66/6=11-th prime of this form (successor of a repdigit "6"), while there are 22 smaller primes of the more general form m*(10^n-1)/9+1. [Hasler]




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