271951

Appears in sequences

• Strong pseudoprimes to base 2.at n=24A001262
• Values of Newton-Gregory forward interpolating polynomial (1/6)*(4*n^4 - 60*n^3 + 347*n^2 - 927*n + 978).at n=29A030442
• Pseudoprimes to base 2 of the form 4k+3.at n=14A177884
• Composite numbers k == 3 (mod 4) such that (1 + i)^k == 1 - i (mod k), where i = sqrt(-1).at n=4A270697
• Numbers k such that 20^k + 3 is prime.at n=18A339921
• Base-2 Fermat pseudoprimes k such that the multiplicative order of 2 modulo k is odd.at n=8A367230