 |
1021 (another Prime Pages' Curiosity) |
|
|
|
Curios:
Curios Search:
Participate: 
|
Single Curio View: (Seek other curios for this number) Note that in the matrix product:
[ 1 0 ] [ 2 3 ] [ 2 3 ]
=
[ 2 1 ] [ 1 1 ] [ 5 7 ]
1021 is prime, 2311 is prime, 2, 3, 5 and 7 are the
first four primes (and incidentally, 2357 is prime). This
is the only pair of 2-by-2 matrices with this property. [Hartley]
Submitted: 2009-02-10 18:52:39; Last Modified: 2009-02-10 19:43:34.
Prime Curios! © 1999-2012 (all rights
reserved)
|