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

[Valentin Albillo]

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Hi, PeterP:

(02-25-2021 09:29 PM)PeterP Wrote:  Challenge 5 - Perfect Primes.

I am clearly not understanding the challenge. Here is what I at first thought it meant:

Quote:A perfect prime is a prime where there is no way you can make it composite by changing one digit (and one digit only) into any other digit.

[...]
Would be great if someone could help me understand what I am missing (which I am sure is blatantly obvious)

With pleassure. You say you thought that it meant:

       "A perfect prime is a prime where there is no way you can make it composite by changing one digit (and one digit only) into any other digit."

but actually it's exactly the opposite, it should be "[...] there is no way you can make it prime [...]". Quoting my original definition:

I Wrote:[...] consider a prime number so 'Perfectly Prime' (a PP for short, pronounced "Pepe") that changing any single digit would diminish its primeness by turning it into a composite number. Note: We're talking about base-10 digits here.`

I hope that this makes it perfectly clear to you, and thanks for your interest and both recent messages you posted.

V.