121220101

Properties

Appears in sequences

• Numbers of the form n^2+1 such that 3^(m+3)==9 (mod m) where m=n^4-1.at n=16A212876
• Primes of the form n^2 + 1 such that (n - 1)^2 + 1 and (n + 1)^2 + 1 are semiprimes.at n=23A234693
• Prime numbersat n=6907187