86927domain: 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=28A059667Integers k such that k + 1 has a divisor that is an anagram of k, which must have the same number of digits as k.at n=38A384597Prime numbersat n=8443