a(n) is the smallest number with n digits, all of which are prime, and n prime factors, counted with multiplicity, or -1 if there is no such number.

A384403

a(n) is the smallest number with n digits, all of which are prime, and n prime factors, counted with multiplicity, or -1 if there is no such number.

Terms

    a(0) =2a(1) =22a(2) =222a(3) =2223a(4) =22232a(5) =222222a(6) =2222325a(7) =22222272a(8) =222225552a(9) =2222223255a(10) =22222335232a(11) =222222327525

External references