17971...97731 (27-digits)

This number is a composite.

                                               1797193 3739113177 1739397731

+ Farideh Firoozbakht found that 179719337391131771739397731 is a prime number with one hundred primes embedded. [Rivera]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell