524243domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = 2^n - 45 with n>5, a(5)=1.at n=14A036564Smallest prime factor of the concatenation of terms in the n-th row of Pascal's Triangle.at n=27A100755Largest safe prime less than 2^n.at n=16A243916Prime numbersat n=43386