30397349domain: NPropertiesPrimalityPrimeyesAppears in sequencesLesser of twin primes of the form k^1 + k^2 + k^3 + k^4 - 1.at n=7A156026Primes of the form k^4 + k^3 + k^2 + k - 1.at n=17A182385Prime numbersat n=1881034