121463

Appears in sequences

• Strong pseudoprimes to base 5.at n=20A020231
• Overpseudoprimes to base 5.at n=11A141390
• The "non-residue" pseudoprimes: odd composite numbers n such that b(n)^((n-1)/2) == -1 (mod n), where base b(n) = A020649(n).at n=7A307767
• Smallest "non-residue" pseudoprime to base prime(n).at n=2A307809
• Base-5 Euler-Jacobi pseudoprimes: odd composite k coprime to 5 such that 5^((k-1)/2) == (5/k) (mod n), where (5/k) is the Jacobi symbol (or Kronecker symbol).at n=36A375914
• Composite numbers k == 3, 7 (mod 10) such that 5^((k-1)/2) == -1 (mod k).at n=1A375916