5016191

Appears in sequences

• Composite numbers m such that (4^m - 2^m + 8*m^2 - 2) / (2*m*(2*m + 1)) is an integer.at n=24A235540
• Composite numbers k == 3 (mod 4) such that (1 + i)^k == 1 - i (mod k), where i = sqrt(-1).at n=28A270697
• Lucasian pseudoprimes: composite numbers k such that 2^(k-1) == k+1 (mod k(2k+1)).at n=5A343679
• Base-2 Fermat pseudoprimes k such that the multiplicative order of 2 modulo k is odd.at n=29A367230