55555517domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime beginning with exactly n 5's.at n=6A065588Smallest prime starting with n 5s.at n=6A068105Smallest prime of the form: all fives followed by prime(n). a(n) >prime(n). 0 if no such prime exists.at n=6A114787Prime numbersat n=3313333