88888...33221 (36-digits)

                                     888888 8877777776 6666655555 4444333221

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

+ 888888887777777666666555554444333221 - 8 is prime. [Firoozbakht]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell