11

Part of 1978 IMO Longlists

Problems(1)

Find all n s.t. m<n, n<1978, (m, n)=1 implies m is prime.

Source:

Find all natural numbers

n < 1978

with the following property: If

m

is a natural number,

1 < m < n

(m, n) = 1

m

n

are relatively prime), then

m

is a prime number.

number theoryrelatively primenumber theory unsolved