119552

Appears in sequences

• Least k such that (k*M(n))^2+k*M(n)-1 is the first of a pair of twin primes, where M(n) = Mersenne primes.at n=13A109342
• Least number k such that (k*M(n))^2 + k*M(n) - 1 and (k*M(n))^2 + k*M(n) + 1 are twin primes where M(n) is the n-th Mersenne prime.at n=13A121371
• Number of composites removed in each step in the Sieve of Eratosthenes for 10^8.at n=25A227797