I am studying about Giuga number and read a paragraph that says all Giuga number n satisfy the property $\sum_{p|n}1/p - 1/n \in Natural Number$ and beside it says that all known Giuga number also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?

I am studying Giuga numbers and I am reading a paragraph that says all Giuga numbers $n$ satisfy the property $\left(\sum_{p|n}1/p\right) - 1/n \in \mathbb{N}$ and beside it says that all known Giuga numbers also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?

I am studying Giuga numbers and I am reading a paragraph that says all Giuga numbers $n$ satisfy the property $\left(\sum_{p|n}1/p\right) - 1/n \in \mathbb{N}$ and beside it says that all known Giuga numbers also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?

I am studying about Giuga number and read a paragraph that says all Giuga number n satisfy the property $\sum_{p|n}1/p - 1/n \in Natural Number$ and beside it says that all known Giuga number also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?

I am studying about Giuga number and read a paragraph that says all Giuga number n satisfy the property $\sum_{p|n}1/p - 1/n \in Natural Number$ and beside it says that all known Giuga number also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?

I am studying Giuga numbers and I am reading a paragraph that says all Giuga numbers $n$ satisfy the property $\left(\sum_{p|n}1/p\right) - 1/n \in \mathbb{N}$ and beside it says that all known Giuga numbers also satisfy $\sum_{p|n}{1}/{p} - 1/n = 1$. So is it proven or just a conjecture?