769757

Appears in sequences

• Pseudoprimes whose prime factors do not divide any smaller pseudoprime.at n=24A084653
• Sarrus numbers k such that k-1 and k+1 have the same number of prime divisors (counted with multiplicity).at n=10A086806
• Semiprime 2-pseudoprimes of the form 10k + 7.at n=23A216667
• Fermat pseudoprimes that are not Carmichael numbers and have only composite XOR couples as defined in A182108.at n=7A252944
• Odd numbers k > 1 such that 2^((k-1)/2) == -(2/k) = -A091337(k) (mod k), where (2/k) is the Jacobi (or Kronecker) symbol.at n=26A306310
• Pseudoprimes congruent to 7 mod 10.at n=28A317972
• a(n) is the smallest Fermat pseudoprime to base 2 such that gpf(p-1) = prime(n) for all prime factors p of a(n).at n=29A327789