In number theory, a Wieferich prime is a prime number p such that p2 divides 2p − 1 − 1, therefore connecting these primes with Fermat's little theorem...

1645333507, 6692367337, 188748146801 As of 2018[update], these are all known Wieferich primes with a ≤ 25. Primes p for which p2 divides (p−1)! + 1. 5, 13, 563...

Arthur Josef Alwin Wieferich (April 27, 1884 – September 15, 1954) was a German mathematician and teacher, remembered for his work on number theory, as...

In number theory, a Wall–Sun–Sun prime or Fibonacci–Wieferich prime is a certain kind of prime number which is conjectured to exist, although none are...

In mathematics, a Wieferich pair is a pair of prime numbers p and q that satisfy pq − 1 ≡ 1 (mod q2) and qp − 1 ≡ 1 (mod p2) Wieferich pairs are named after...

Wieferich's theorem may refer to one of the following results named after Arthur Wieferich: Wieferich's criterion for the solubility of the "First Case"...

Primes for which this is true for a = 2 are called Wieferich primes. In general they are called Wieferich primes base a. Known solutions of qp(a) ≡ 0 (mod...

3511 is a Wieferich prime, found to be so by N. G. W. H. Beeger in 1922 and the largest known – the only other being 1093. If any other Wieferich primes...

3277 – 5th super-Poulet number, decagonal number 3279 – first composite Wieferich number 3281 – octahedral number, centered square number 3286 – nonagonal...

S2CID 206172705. Stauffer VK, Luedi MM, Kauf P, Schmid M, Diekmann M, Wieferich K, et al. (February 2018). "Common surgical procedures in pilonidal sinus...