What is "wieferich"

Wieferich may refer to:

• Arthur Wieferich (1884–1954), German mathematician and eponymous topics:
  • Wieferich pair, a special pair of prime numbers
  • Wieferich prime, a special type of prime number in number theory
    • Wieferich number, an integer satisfying at least one of two specific conditions
  • Wieferich's theorem (disambiguation), some results named after Arthur Wieferich