193957

This number is a prime.

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

+ 193957 = prime(prime((1!!+9!!+3!!+9!!+5!!+7!!)). Note that 193957 is the only number with this property. [Firoozbakht]

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