(adsbygoogle = window.adsbygoogle || []).push({}); Why 30 is the largest integer such that none of its....?

Why 30 is the largest integer such that none of its totatives are composite?

which means All the coprime numbers that below 30 are primes..

30=> 7,11,13,17,19,23,29

??????//

and if you have a proof that it is the biggest integer please Help me...

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Why 30 is the largest integer such that none of its ?

**Physics Forums | Science Articles, Homework Help, Discussion**