8887
This number is a prime.
The largest prime formed by concatenating in descending order two consecutive double-digit numbers. [Loungrides]
The largest 4-digit prime p with a maximum of 6 loops. Note that (88-87) + p is the largest 4-digit repdigit number
with a maximum of 8 loops, where 8 is the repdigit digit. [Worrom]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell