Circular
prime
A
circular prime is a prime number with the property that the number generated at
each intermediate step when cyclically permuting its (base 10) digits will be
prime.
For
example, 1193 is a circular prime, since 1931, 9311 and 3119 all are also prime.
Note:
A circular prime with at least two
digits can only consist of combinations of the digits 1, 3, 7 or 9, because
having 0, 2, 4, 6 or 8 as the last digit makes the number divisible by 2, and
having 0 or 5 as the last digit makes it divisible by 5.
Reference:
Can you ellaborate it.. please!!!!!
ReplyDelete1193 --1st Rotation--> 1931: A prime number
Delete1931 --2nd Rotation--> 9311: A prime number
9311 --3rd Rotation--> 3119: A prime number
3119 --3rd Rotation--> 1193: Again a prime number