# 241

This number is a prime.

Single Curio View: (Seek other curios for this number)

Let U(0) = 0, U(1) = 1, U(n) = 3*U(n-1) + U(n-2) for
n>1, then 241 is the only known prime p such that p^2
divides U(p-(13|p)), where (13|p) is the Legendre symbol,
i.e., a Wall-Sun-Sun-type prime to this Lucas sequence. [Luen]
Submitted: 2015-10-03 13:14:48; Last Modified: 2021-01-28 16:55:08.

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