327757domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime-indexed primes (PIPs) whose digits are all primes.at n=31A087368a(n) is the numerator of (1134*n^3 + 2097*n^2 + 1188*n + 193)/(10368*n^4 + 20736*n^3 + 14112*n^2 + 3744*n + 320).at n=6A374607Prime numbersat n=28229