41
This number is a prime.
Single Curio View: (Seek other curios for this number)
Sum a number in blocks of five digits (from the right); if
the result is divisible by 41, so is the number. [Roberts]
Submitted: 2023-08-03 02:44:02; Last Modified: 2023-08-03 02:46:06.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean