973241

Appears in sequences

• Overpseudoprimes to base 3.at n=36A141350
• Strong pseudoprimes to base 3 of the form 6*k-1.at n=2A215565
• 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=20A307767
• Composite numbers k == 5, 7 (mod 12) such that 3^((k-1)/2) == -1 (mod k).at n=31A375918