2951
This number is a composite.
The number of right-truncatable semiprimes less than 109. Note that 2951 (13 x 227) is a semiprime. [Pfoertner]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a composite.
The number of right-truncatable semiprimes less than 109. Note that 2951 (13 x 227) is a semiprime. [Pfoertner]