250062751domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form n^4 - n^3 + n^2 - n + 1.at n=24A259257Primes of the form 1 - sigma(n) + sigma(n)^2 - sigma(n)^3 + sigma(n)^4.at n=9A259412Primes of the form 1 - sigma(n) + sigma(n)^2 - sigma(n)^3 + sigma(n)^4.at n=12A259412Prime numbersat n=13682541