[VA] Short & Sweet Math Challenge #25 "San Valentin's Special: Weird Math"

[PeterP]

(02-26-2021 07:39 AM)Werner Wrote:  Take 11, for instance.
If you change its last digit to 2, it is no longer prime. But if you change it to 3, it IS prime, so 11 is not a perfect prime.
The goal is to find primes so that changing any digit would NOT result in another prime.

Cheers, Werner

LIGHTBULB (i think). In other words, i cannot transform a perfect prime into another prime by changing one digit of it. So if I change any digit of 294001 I will never get another Prime. (Hopefully I got it) Thank you Werner!