84907

Appears in sequences

• Numbers k such that 139*2^k-1 is prime.at n=44A050595
• a(n) = 4*p(n-1)*p(n+1) - p(n)^2, where p(k) = k-th prime.at n=37A327447
• E.g.f.: exp(x) / (1 - 3 * x)^(1/3).at n=6A346258
• First of 5 consecutive semiprimes congruent to 1,2,3,4,5 (mod 6).at n=16A367104
• Smallest semiprime p1*p2 such that p2 mod p1 = n and no prime is used more than once in the sequence.at n=36A386256