1409

This number is a prime.

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

+ 1409 contains no prime digits. π(1409) equals 223 and contains all prime digits. π(223) equals 48 with no prime digits. Note that 1409 is the smallest prime with this property. [Punches]

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