91

This number is a composite.

Single Curio View:   (Seek other curios for this number)
10n + 91 {+ 0, + 2} are twin primes for n = 1, 2, 3 and 4. [Luhn]

Submitted: 1999-09-02 18:40:00;   Last Modified: 2008-01-30 11:28:00.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell