7547
This number is a prime.
The largest known prime p such that (p^p-1)/(p-1) is also a (probable) prime. Note that (p^p-1)/(p-1) = Cyclotomic(p,p). Found by H. Lifchitz, June 2003. [Noe]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell