774023
This number is a prime.
Just showing those entries submitted by 'Bajpai': (Click here to show all)
The smallest emirp p such that prime(p)*p-π(p) and
prime(p)*p+π(p) yield two more emirps (9111644663389 and
9111644787457) respectively. The next number with this
property is 75489719. [Bajpai]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell