Arthur Wieferich
= Arthur Wieferich
{wiki=Arthur_Wieferich}
Arthur Wieferich was a German mathematician, known for his work in number theory. He is primarily recognized for his contribution to the study of "Wieferich primes," which are prime numbers \\( p \\) that satisfy the congruence \\( 2^\{p-1\} \\equiv 1 \\mod p^2 \\).