Wieferich prime
Near-Wieferich primes
A prime p satisfying the congruence 2 ≡ ±1 + Ap (mod p²) with small |A| is commonly called a near-Wieferich prime (sequence A195988 in the OEIS).

Wieferich prime

Section Title: Near-Wieferich primes
Table Section Text: A prime p satisfying the congruence 2 ≡ ±1 + Ap (mod p²) with small |A| is commonly called a near-Wieferich prime (sequence A195988 in the OEIS).

p

1093	0	0

3511	0	0

2276306935816523	+6	0.264

3167939147662997	−17	0.537

3723113065138349	−36	0.967

5131427559624857	−36	0.702

5294488110626977	−31	0.586

6517506365514181	+58	0.890

Sentence(s)

The known Wieferich primes are 1093 and 3511.

final_sentence: The known Wieferich primes are 1093 and 3511.