83791domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that x^49 = 2 has no solution mod p, but x^7 = 2 has a solution mod p.at n=25A059667a(n) = 4^n mod n^4.at n=20A066608a(n) = tau(n)^n mod n^tau(n).at n=20A302976Prime numbersat n=8175