801978

Appears in sequences

• Numbers k such that 3*2^k + 1 is prime.at n=40A002253
• Numbers n such that 105*2^n-1 is prime.at n=57A050578
• Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 3^(2^m) + 1 for some m.at n=31A268657
• Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 5^(2^m) + 1 for some m.at n=17A268658