292147domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime numbers that cannot be expressed as a sum of 2 triangular numbers and a power of 2.at n=2A112625Primes p of the form p=n^2+3n+9 such that q=p^2+3p+9 is also prime.at n=10A175284Prime numbersat n=25397